WO2024113877A1 - Quick-setting filling process and system for paste - Google Patents

Quick-setting filling process and system for paste Download PDF

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Publication number
WO2024113877A1
WO2024113877A1 PCT/CN2023/106468 CN2023106468W WO2024113877A1 WO 2024113877 A1 WO2024113877 A1 WO 2024113877A1 CN 2023106468 W CN2023106468 W CN 2023106468W WO 2024113877 A1 WO2024113877 A1 WO 2024113877A1
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Prior art keywords
paste
quick
setting
filling
accelerator
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PCT/CN2023/106468
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French (fr)
Chinese (zh)
Inventor
张晓�
马冰
李向阳
王洋
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天地(榆林)开采工程技术有限公司
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Publication of WO2024113877A1 publication Critical patent/WO2024113877A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00—Methods or devices for placing filling-up materials in underground workings
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00—Methods or devices for placing filling-up materials in underground workings
    • E21F15/06—Filling-up mechanically
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00—Methods or devices for placing filling-up materials in underground workings
    • E21F15/08—Filling-up hydraulically or pneumatically
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the present application relates to the technical field of mine filling, and in particular to a paste rapid-setting filling process and system.
  • the initial slump of the paste is generally about 250mm, and the solidification time of the paste after arriving at the filling area is as long as 8 to 12 hours.
  • the filling area needs to be isolated and sealed. Due to the good fluidity of the paste, the diffusion radius reaches more than 60m. Generally, the filling volume is more than 1000m3 at a time, which increases the intensity and difficulty of filling isolation.
  • personnel are required to monitor the integrity of the isolation support and retaining wall at any time, otherwise it may cause slurry leakage accidents, bringing safety risks to on-site construction personnel.
  • the working time of the isolation and filling process is as long as 20 hours, the filling efficiency is low, which restricts the improvement of filling capacity.
  • Rapid-setting filling has gradually been used for underground mine filling, but the rapid-setting filling in existing technologies is mostly done directly after slurrying in the mine. On the one hand, it takes up a large space underground, and the transportation of equipment and materials to the mine requires a lot of manpower and material resources; on the other hand, the flexibility and safety of underground operations are weaker than those of ground operations. In order to achieve rapid solidification of large amounts of paste, more accelerating agents need to be added, and the transportation and storage costs of additives are increased.
  • the purpose of the present application is to provide a paste quick-setting filling process and system by By adding it in batches from the ground and from the end of the underground well, the quick-setting time of the paste can be flexibly controlled. At the same time, it can significantly save underground working space and the amount of underground quick-setting agent, thereby saving costs. Moreover, through the regulation of segmented quick-setting, the total amount of quick-setting agent can be significantly reduced. Therefore, it has high safety and economy and is easy to put into practical application.
  • the present application provides a paste quick-setting filling system, comprising: a ground slurry system and a downhole quick-setting agent filling system;
  • the ground slurry system comprises an aggregate adding device and a liquid material adding device, which are used to add a first quick-setting agent and water;
  • the downhole quick-setting agent filling system comprises a downhole pipeline, a second quick-setting agent adding device, a material distribution pipeline and a filling area connected in sequence; before the first quick-setting agent and the second quick-setting agent are mixed, the quick-setting time of the paste is greater than 1 hour; after the first quick-setting agent and the second quick-setting agent are mixed, the quick-setting time of the paste is shortened to 5-30 minutes.
  • the liquid material adding device includes a first accelerating agent storage tank, a first filling pump, a first solenoid valve, a first flow meter and a water weighing bucket which are connected in sequence, and the addition amount of the first accelerating agent is controlled by the first solenoid valve and the first flow meter.
  • the second accelerator adding device includes a second accelerator storage tank, a second filling pump, a second solenoid valve, a second flow meter and a pipeline mixer which are connected in sequence; the pipeline mixer is arranged at the connection position between the downhole pipeline and the material distribution pipeline.
  • the ground pulping system also includes a mixing device connected to the aggregate adding device and the liquid material adding device respectively; the mixing device is connected to the downhole pipeline via a filling pump and a ground pipeline.
  • the filling system also includes a first accelerating-setting agent paste conveying capacity monitoring system for real-time monitoring of the flow rate and flow rate of the first accelerating-setting agent paste to determine the addition amount of the second accelerating-setting agent.
  • the filling system also includes a slurry state and material level monitoring device arranged in the filling area, which is used to observe the flow state of the mixed paste.
  • a paste quick-setting filling process using any of the paste quick-setting filling systems described above, comprises the following steps:
  • the second accelerating agent is mixed with the first accelerating agent paste through the second accelerating agent adding device, and then transported to the filling area through the material distribution pipeline;
  • the addition amount of the first accelerator is determined according to the flow time of the first accelerator paste to ensure that the slump of the first accelerator paste before mixing with the second accelerator is greater than 260 mm; the addition amount of the second accelerator is determined according to the flow velocity and flow rate of the first accelerator paste to ensure that the quick-setting time of the mixed paste is greater than the time it takes for the mixed paste to flow from the outlet of the mixing device to the filling area.
  • the first accelerating setting agent and the second accelerating setting agent have different components, and the quick-setting time of the final paste can be regulated by adding them in two batches and controlling the added amount.
  • the total dosage of the first and second accelerators is 5-10 kg/m 3 .
  • the first and second accelerators are selected from aqueous solutions composed of sodium aluminate, potassium hydroxide, sodium carbonate, potassium carbonate, sodium silicate, aluminum hydroxide, triethanolamine, and aluminum sulfate. Preferably, they are one of sodium aluminate and sodium sulfate.
  • the type and addition amount of the first accelerator are designed so that the slump of the first accelerator paste before mixing with the second accelerator is greater than 260 mm; based on the total length of the flow path of the mixed paste and the pipe diameter, as well as the flow rate and flow rate of the first accelerator paste, the type and addition amount of the second accelerator are determined so that the mixed paste sets quickly within 10 minutes after entering the filling area; while satisfying the above constraints, the total usage of the first accelerator and the second accelerator is minimized.
  • the paste quick-setting filling process and system provided in the present application can flexibly control the quick-setting time of the paste by adding the quick-setting agent in batches from the ground and from the end of the underground well; at the same time, it can significantly save the underground working space and the amount of the underground quick-setting agent, thereby saving costs, and through the regulation of segmented quick-setting, the total amount of the quick-setting agent can be significantly reduced, so it is safe and economical, and is easy to put into practical application.
  • the present application can regulate the types and dosages of the first accelerator and the second accelerator according to the flow paths of the two accelerators, so that the paste solidifies as quickly as possible after entering the filling area, while minimizing the dosage of the second accelerator underground, thereby reducing the amount of underground operations.
  • FIG1 is a schematic structural diagram of a paste rapid setting filling system provided by the present application.
  • the present application provides a paste quick-setting filling system, including: a ground slurry system 10 and an underground quick-setting agent filling system 20;
  • the ground slurry system 10 includes an aggregate adding device (such as the aggregate weighing bucket 11 in Figure 1) and a liquid material adding device, which are used to add a first quick-setting agent and water;
  • the underground quick-setting agent filling system 20 includes an underground pipeline 21, a second quick-setting agent adding device, a material distribution pipeline 27 and a filling area 28 connected in sequence.
  • the main slurry-making equipment is all located on the ground, which is highly safe and easy to operate. There is no need to transport materials underground in large quantities, saving manpower, material resources and underground working space.
  • the aggregate of the paste and part of the accelerating setting agent (the first accelerating setting agent) are mixed with water to obtain a first accelerating setting agent paste with good fluidity.
  • the paste can satisfy the requirement that the quick-setting time of the paste is greater than 1h before mixing with the second accelerating setting agent. More importantly, it satisfies the requirement that the fluidity before mixing is good, that is, the slump is greater than 260mm, so as to ensure the flow rate of the paste and prevent blockage.
  • the time required for mixing the first accelerating setting agent paste with the second accelerating setting agent paste can be calculated based on the length of the conveying route and the flow rate of the first accelerating setting agent paste, and then the type and addition amount of the first accelerating setting agent can be designed.
  • the first accelerating setting agent paste is about to flow to the filling area, that is, in the distribution pipe
  • a second accelerating agent adding device is added, so that the remaining part of the accelerating agent enters the paste delivery pipeline and is mixed with the first accelerating agent paste.
  • a pipeline type mixer 26 is set on the pipeline to obtain a mixed paste.
  • the type and amount of the second accelerating agent are determined according to the state of the first accelerating agent paste when mixed, so that after the first accelerating agent and the second accelerating agent are mixed, the quick setting time of the mixed paste is shortened to 5-30 minutes, preferably 5-20 minutes, more preferably 5-15 minutes, and more preferably 5-10 minutes.
  • the aggregate of the present application can be selected from coal gangue (or aeolian sand), fly ash, and silicate cement, the paste mass concentration is between 70% and 82%, the particle size of the gangue aggregate is generally less than or equal to 10 mm, and the mass ratio of coal gangue (or aeolian sand), fly ash, silicate cement and water in the paste is about 6:1:1:2.
  • the first accelerator and the second accelerator are added.
  • the liquid material adding device includes a first accelerator storage tank 12, a first filling pump 13, a first solenoid valve 14, a first flowmeter 15 and a water weighing bucket 16 connected in sequence, and the addition amount of the first accelerator is controlled by the first solenoid valve 14 and the first flowmeter 15.
  • the weighing system error is less than or equal to 5kg/ m3 .
  • the ground pulping system 10 also includes a mixing device 17 connected to the aggregate adding device and the liquid material adding device respectively; the mixing device 17 is connected to the downhole pipeline 21 through a filling pump 18 and a ground pipeline.
  • the first accelerator is quantitatively added from the first accelerator storage tank 12 to the water weighing bucket 16, and the adding method is pump pressure pipeline transportation.
  • the signal of the first flowmeter 15 is connected to the ground filling centralized monitoring system, which is convenient for intelligent control of the filling process parameters.
  • the second accelerator adding device includes a second accelerator storage tank 22, a second filling pump 23, a second solenoid valve 24, a second flowmeter 25 and a pipeline mixer 26 which are connected in sequence; the pipeline mixer 26 is arranged at the connection part of the downhole pipeline 21 and the material distribution pipeline 27.
  • the second accelerator is added to the pipeline mixer 26 at the end of the paste conveying trunk pipeline, that is, at the entrance of the material distribution pipeline 27, which is ⁇ 200m away from the discharge port of the material distribution pipeline 27, for example, a point value in 100-180m, in order to reduce the flow time of the mixed paste, thereby preventing its rapid setting from being blocked.
  • the second solenoid valve 24 and the second flowmeter 25 are also controlled by the controller, and the metering signal is connected to the ground filling centralized monitoring system to ensure accurate proportioning and controllable rapid setting time.
  • the filling system also includes a first accelerating setting agent paste conveying capacity monitoring system, which monitors the flow rate and flow of the first accelerating setting agent paste in real time through hardware monitoring and software calculation to determine the addition amount of the second accelerating setting agent.
  • the filling system also includes a slurry state and material level monitoring device arranged in the filling area 28, which is used to monitor the slurry state and material level. It is used to observe the flow state of the mixed paste. It is mainly composed of monitoring cameras, level meters, and controllers. It can visually monitor the flow state of the mixed paste, monitor the slurry level in time and feed it back to the ground centralized monitoring system to achieve high filling rate.
  • a slurry state and material level monitoring device arranged in the filling area 28, which is used to monitor the slurry state and material level. It is used to observe the flow state of the mixed paste. It is mainly composed of monitoring cameras, level meters, and controllers. It can visually monitor the flow state of the mixed paste, monitor the slurry level in time and feed it back to the ground centralized monitoring system to achieve high filling rate.
  • the present application also provides a paste quick-setting filling process, which uses any of the above paste quick-setting filling systems and includes the following steps:
  • the paste is mixed with all the aggregates and the first accelerating agent and water from the ground slurry system 10 to obtain the first accelerating agent paste, which is then transported to the downhole pipeline 21;
  • the second accelerator is transported to the inlet of the distribution pipe 27 through the second accelerator adding device, mixed with the first accelerator paste, and then transported to the filling area 28 through the distribution pipe 27; wherein, the type and addition amount of the first accelerator are determined according to the flow time of the first accelerator paste to ensure that the slump of the first accelerator paste before mixing with the second accelerator is greater than 150 mm; the type and addition amount of the second accelerator are determined according to the flow velocity and flow rate of the first accelerator paste to ensure that the quick-setting time of the mixed paste is greater than the time it takes to flow from the inlet of the distribution pipe 27 to the filling area 28.
  • the type and amount of the first quick-setting agent are designed so that the slump of the first quick-setting agent paste before mixing with the second quick-setting agent is greater than 260 mm.
  • the calculation of this process will affect the flow rate of the first quick-setting agent paste due to the addition of the first quick-setting agent, and then affect its flow time, so that its type and amount can be regulated to regulate the state when it is mixed with the second quick-setting agent.
  • the type and amount of the second quick-setting agent are determined so that the mixed paste can be quickly set within 10 minutes after entering the filling area 28; under the above constraints, the amount of the first quick-setting agent is maximized and the amount of the second quick-setting agent is minimized, which is the optimal implementation method of quick-setting filling.
  • Such a setting can reduce the amount of underground quick-setting agent as much as possible, thereby reducing the amount of materials transported underground and saving manpower and material resources.
  • the first accelerating setting agent and the second accelerating setting agent are different components in the accelerating setting agent formula, and the quick setting time of the mixed paste is regulated by controlling the batch mixing of each component. For example, a two-component accelerating setting agent formula is selected, and the first accelerating setting agent and the second accelerating setting agent are respectively one of the components. When the two components are mixed, the quick setting effect is better.
  • the accelerating setting agent of the present application is an aqueous solution composed of one or more of potassium hydroxide, sodium hydroxide, sodium carbonate, potassium carbonate, sodium silicate, aluminum hydroxide, triethanolamine, sodium aluminate, and aluminum sulfate. Sodium aluminate and sodium sulfate are selected, and triethanolamine is added.
  • the total length of the first accelerator paste pipeline of the filling system of the present application is 2500m
  • the length of the distribution pipeline 27 is 100m
  • the pipeline diameter is 200mm
  • the conveying capacity is 120-150m3 /h
  • the first accelerator is a mixed aqueous solution of sodium aluminate and triethanolamine
  • the second accelerator is an aqueous solution of aluminum sulfate.
  • the amount of the first accelerator is 2.2kg/ m3
  • the slump is 260mm
  • the amount of the second accelerator is 5.8kg/ m3
  • the quick setting time is 12min

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Abstract

The present application provides a quick-setting filling process and system for paste. The system comprises a ground pulping system and an underground accelerating agent filling system. The ground pulping system comprises a material addition device and a liquid material addition device; the liquid addition device is used for adding a first accelerating agent and water; the underground accelerating agent filling system comprises an underground pipeline, a second accelerating agent addition device, a material distributing pipeline, and a filling area which are connected in sequence; before the first accelerating agent is mixed with the second accelerating agent, the quick-setting time of the paste is greater than 1 h; after the first accelerating agent is mixed with the second accelerating agent, the quick-setting time of the paste is shortened to 5-30 min. According to the present application, the accelerating agents are added from the ground and the underground tail end in batches, so that the quick-setting time of the paste is flexibly regulated and controlled, and the underground operation space and the dosage of the underground accelerating agents can be remarkably reduced, thereby saving costs. Moreover, the total dosage of the accelerating agents can be remarkably reduced by means of regulation and control of quick-setting in stages, so that the safety and the economical efficiency are high, and the present application is suitable for practical application.

Description

膏体速凝充填工艺和***Paste quick-setting filling process and system
相关申请的交叉引用CROSS-REFERENCE TO RELATED APPLICATIONS
本申请要求于2022年11月28日提交的申请号为202211504375.2，发明名称为“膏体速凝充填工艺和***”的中国专利申请的优先权，其通过引用方式全部并入本文。This application claims priority to Chinese patent application No. 202211504375.2, filed on November 28, 2022, and entitled “Paste Rapid Setting Filling Process and System”, which is incorporated herein by reference in its entirety.
技术领域Technical Field
本申请涉及矿井充填技术领域，尤其涉及一种膏体速凝充填工艺和***。The present application relates to the technical field of mine filling, and in particular to a paste rapid-setting filling process and system.
背景技术Background technique
煤矿综采膏体充填和大断面短壁充填开采，为保证膏体长距离安全输送，膏体初始坍落度一般在250mm左右，膏体到充填区后凝固时间长达8～12h。充填前，需要对充填区域进行隔离密闭，由于膏体流动性好，扩散半径达到60m以上，一般的，一次充填方量都在1000m3以上，增加了充填隔离的强度和难度。充填过程中，需要人员随时监测隔离支架、挡墙完好情况，否则可能造成跑浆事故，给现场施工人员带来安全风险。同时由于隔离、充填工序工作时间长达20h，造成充填效率低下，制约充填产能提高。In the comprehensive mining of coal mines, paste filling and large-section short-wall filling, in order to ensure the safe long-distance transportation of paste, the initial slump of the paste is generally about 250mm, and the solidification time of the paste after arriving at the filling area is as long as 8 to 12 hours. Before filling, the filling area needs to be isolated and sealed. Due to the good fluidity of the paste, the diffusion radius reaches more than 60m. Generally, the filling volume is more than 1000m3 at a time, which increases the intensity and difficulty of filling isolation. During the filling process, personnel are required to monitor the integrity of the isolation support and retaining wall at any time, otherwise it may cause slurry leakage accidents, bringing safety risks to on-site construction personnel. At the same time, since the working time of the isolation and filling process is as long as 20 hours, the filling efficiency is low, which restricts the improvement of filling capacity.
速凝充填已逐步用于井下矿井充填，但现有技术的速凝充填大多是直接在井下制浆后充填，一方面需要占用井下较大空间，设备和物料向井下的搬运需要耗费大量人力物力；另一方面，井下作业的灵活性和安全性相对地面作业更弱，要想实现大方量膏体快速凝固，需要添加较多速凝剂，添加剂运输存储成本提高。Rapid-setting filling has gradually been used for underground mine filling, but the rapid-setting filling in existing technologies is mostly done directly after slurrying in the mine. On the one hand, it takes up a large space underground, and the transportation of equipment and materials to the mine requires a lot of manpower and material resources; on the other hand, the flexibility and safety of underground operations are weaker than those of ground operations. In order to achieve rapid solidification of large amounts of paste, more accelerating agents need to be added, and the transportation and storage costs of additives are increased.
为此，需要提供一种安全的膏体速凝充填工艺和***，确保进入充填区的膏体限时速凝，最大限度提高安全和产能。Therefore, it is necessary to provide a safe paste rapid setting filling process and system to ensure that the paste entering the filling area is rapidly set within a limited time, thereby maximizing safety and productivity.
发明内容Summary of the invention
本申请的目的在于提供一种膏体速凝充填工艺和***，通过将速凝剂 分批从地面加入和从井下末端加入，实现对膏体速凝时间的灵活调控，与此同时，能够显著节约井下作业空间和井下速凝剂用量，从而节约成本，而且，通过分段速凝的调控，能够显著降低速凝剂的总用量，因此安全性和经济性高，便于投入实际应用。The purpose of the present application is to provide a paste quick-setting filling process and system by By adding it in batches from the ground and from the end of the underground well, the quick-setting time of the paste can be flexibly controlled. At the same time, it can significantly save underground working space and the amount of underground quick-setting agent, thereby saving costs. Moreover, through the regulation of segmented quick-setting, the total amount of quick-setting agent can be significantly reduced. Therefore, it has high safety and economy and is easy to put into practical application.
为实现上述目的，本申请提供一种膏体速凝充填***，包括：地面制浆***和井下速凝剂加注***；所述地面制浆***包括骨料添加装置和液体物料添加装置，用于添加第一速凝剂和水；所述井下速凝剂加注***包括依次连接的井下管道、第二速凝剂添加装置、布料管道和充填区域；所述第一速凝剂和所述第二速凝剂混合前，膏体的速凝时间大于1h；所述第一速凝剂和所述第二速凝剂混合后，膏体的速凝时间缩短至5-30min。To achieve the above-mentioned purpose, the present application provides a paste quick-setting filling system, comprising: a ground slurry system and a downhole quick-setting agent filling system; the ground slurry system comprises an aggregate adding device and a liquid material adding device, which are used to add a first quick-setting agent and water; the downhole quick-setting agent filling system comprises a downhole pipeline, a second quick-setting agent adding device, a material distribution pipeline and a filling area connected in sequence; before the first quick-setting agent and the second quick-setting agent are mixed, the quick-setting time of the paste is greater than 1 hour; after the first quick-setting agent and the second quick-setting agent are mixed, the quick-setting time of the paste is shortened to 5-30 minutes.
进一步的，所述液体物料添加装置包括依次连接的第一速凝剂储罐、第一加注泵、第一电磁阀、第一流量计和水称量斗，通过所述第一电磁阀和第一流量计控制所述第一速凝剂的添加量。Furthermore, the liquid material adding device includes a first accelerating agent storage tank, a first filling pump, a first solenoid valve, a first flow meter and a water weighing bucket which are connected in sequence, and the addition amount of the first accelerating agent is controlled by the first solenoid valve and the first flow meter.
进一步的，所述第二速凝剂添加装置包括依次连接的第二速凝剂储罐、第二加注泵、第二电磁阀、第二流量计和管道型混料器；所述管道型混料器设置于所述井下管道和布料管道的连接部位。Furthermore, the second accelerator adding device includes a second accelerator storage tank, a second filling pump, a second solenoid valve, a second flow meter and a pipeline mixer which are connected in sequence; the pipeline mixer is arranged at the connection position between the downhole pipeline and the material distribution pipeline.
进一步的，所述地面制浆***还包括分别与所述骨料添加装置和液体物料添加装置相连的混料装置；所述混料装置通过充填泵及地面管道与所述井下管道相连。Furthermore, the ground pulping system also includes a mixing device connected to the aggregate adding device and the liquid material adding device respectively; the mixing device is connected to the downhole pipeline via a filling pump and a ground pipeline.
进一步的，所述充填***还包括第一速凝剂膏体输送能力监控***，用于实时监测第一速凝剂膏体的流速和流量，以确定所述第二速凝剂的添加量。Furthermore, the filling system also includes a first accelerating-setting agent paste conveying capacity monitoring system for real-time monitoring of the flow rate and flow rate of the first accelerating-setting agent paste to determine the addition amount of the second accelerating-setting agent.
进一步的，所述充填***还包括设置于所述充填区域的料浆状态和料位监测装置，用于观测混合膏体的流动状态。Furthermore, the filling system also includes a slurry state and material level monitoring device arranged in the filling area, which is used to observe the flow state of the mixed paste.
一种膏体速凝充填工艺，采用以上任一项所述的膏体速凝充填***，包括以下步骤：A paste quick-setting filling process, using any of the paste quick-setting filling systems described above, comprises the following steps:
S1.将膏体全部骨料和第一速凝剂及水从地面制浆***混合得到第一速凝剂膏体，然后输送至井下管道；S1. Mix all the aggregates of the paste, the first accelerating agent and water from the ground slurry system to obtain the first accelerating agent paste, and then transport it to the downhole pipeline;
S2.将第二速凝剂通过第二速凝剂添加装置与所述第一速凝剂膏体混合，然后通过所述布料管道输送至充填区域； S2. The second accelerating agent is mixed with the first accelerating agent paste through the second accelerating agent adding device, and then transported to the filling area through the material distribution pipeline;
其中，所述第一速凝剂的添加量根据第一速凝剂膏体的流动时间确定，以确保所述第一速凝剂膏体与所述第二速凝剂混合前的坍落度大于260mm；所述第二速凝剂的添加量根据所述第一速凝剂膏体的流速和流量确定，以确保混合膏体的速凝时间大于其从混合装置出口流动至所述充填区域的时间。Among them, the addition amount of the first accelerator is determined according to the flow time of the first accelerator paste to ensure that the slump of the first accelerator paste before mixing with the second accelerator is greater than 260 mm; the addition amount of the second accelerator is determined according to the flow velocity and flow rate of the first accelerator paste to ensure that the quick-setting time of the mixed paste is greater than the time it takes for the mixed paste to flow from the outlet of the mixing device to the filling area.
进一步的，所述第一速凝剂和第二速凝剂组分不同，通过分两个批次添加，控制添加量实现对最终膏体速凝时间的调控。Furthermore, the first accelerating setting agent and the second accelerating setting agent have different components, and the quick-setting time of the final paste can be regulated by adding them in two batches and controlling the added amount.
所述第一速凝剂和第二速凝剂的总用量为5-10kg/m3。第一速凝剂和第二速凝剂选铝酸钠、自氢氧化钾、碳酸钠、碳酸钾、硅酸钠、氢氧化铝、三乙醇胺、硫酸铝中的一种或多种组成的水溶液。优选分别为铝酸钠和硫酸钠中的一种。The total dosage of the first and second accelerators is 5-10 kg/m 3 . The first and second accelerators are selected from aqueous solutions composed of sodium aluminate, potassium hydroxide, sodium carbonate, potassium carbonate, sodium silicate, aluminum hydroxide, triethanolamine, and aluminum sulfate. Preferably, they are one of sodium aluminate and sodium sulfate.
进一步的，根据所述第一速凝剂膏体的流动路径总长度及管道直径，对所述第一速凝剂的种类及添加量进行设计，以使所述第一速凝剂膏体与所述第二速凝剂混合前的坍落度大于260mm；根据所述混合膏体的流动路径总长度及管道直径，以及所述第一速凝剂膏体的流速和流量，确定所述第二速凝剂的种类及添加量，以使所述混合膏体进入所述充填区域后在10min内速凝；在满足上述约束条件下，使所述第一速凝剂和第二速凝剂的总用量最小化。Furthermore, based on the total length of the flow path of the first accelerator paste and the pipe diameter, the type and addition amount of the first accelerator are designed so that the slump of the first accelerator paste before mixing with the second accelerator is greater than 260 mm; based on the total length of the flow path of the mixed paste and the pipe diameter, as well as the flow rate and flow rate of the first accelerator paste, the type and addition amount of the second accelerator are determined so that the mixed paste sets quickly within 10 minutes after entering the filling area; while satisfying the above constraints, the total usage of the first accelerator and the second accelerator is minimized.
本申请的有益效果如下：The beneficial effects of this application are as follows:
本申请提供的膏体速凝充填工艺和***，通过将速凝剂分批从地面加入和从井下末端加入，实现对膏体速凝时间的灵活调控；与此同时，能够显著节约井下作业空间和井下速凝剂的用量，从而节约成本，而且，通过分段速凝的调控，能够显著降低速凝剂的总用量，因此安全性和经济性高，便于投入实际应用。The paste quick-setting filling process and system provided in the present application can flexibly control the quick-setting time of the paste by adding the quick-setting agent in batches from the ground and from the end of the underground well; at the same time, it can significantly save the underground working space and the amount of the underground quick-setting agent, thereby saving costs, and through the regulation of segmented quick-setting, the total amount of the quick-setting agent can be significantly reduced, so it is safe and economical, and is easy to put into practical application.
本申请能够根据地第一速凝剂的流动路程和第二速凝剂的流动路程，对两者种类及用量进行调控，从而使得膏体在进入充填区域后最快华凝固的同时，井下第二速凝剂的用量最小化，从而减小井下作业量。The present application can regulate the types and dosages of the first accelerator and the second accelerator according to the flow paths of the two accelerators, so that the paste solidifies as quickly as possible after entering the filling area, while minimizing the dosage of the second accelerator underground, thereby reducing the amount of underground operations.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
为了更清楚地说明本申请或现有技术中的技术方案，下面将对实施例 或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in this application or the prior art, the following embodiments are described. Or a brief introduction is given to the drawings required for use in the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
图1是本申请提供的膏体速凝充填***的结构示意图；FIG1 is a schematic structural diagram of a paste rapid setting filling system provided by the present application;
附图标记：
10-地面制浆***；11-骨料称量斗；12-第一速凝剂储罐；13-第一加注
泵；14-第一电磁阀；15-第一流量计；16-水称量斗；17-混料装置；18-充填泵；20-井下速凝剂加注***；21-井下管道；22-第二速凝剂储罐；23-第二加注泵；24-第二电磁阀；25-第二流量计；26-管道型混料器；27-布料管道；28-充填区域。Reference numerals:
10-ground slurrying system; 11-aggregate weighing bucket; 12-first accelerator storage tank; 13-first filling pump; 14-first solenoid valve; 15-first flow meter; 16-water weighing bucket; 17-mixing device; 18-filling pump; 20-downhole accelerator filling system; 21-downhole pipeline; 22-second accelerator storage tank; 23-second filling pump; 24-second solenoid valve; 25-second flow meter; 26-pipeline mixer; 27-material distribution pipeline; 28-filling area.
具体实施方式Detailed ways
为使本申请的目的、技术方案和优点更加清楚，下面对本申请中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。In order to make the purpose, technical solution and advantages of this application clearer, the technical solution in this application is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
请参阅图1所示，本申请提供一种膏体速凝充填***，包括：地面制浆***10和井下速凝剂加注***20；地面制浆***10包括骨料添加装置(如图1中的骨料称量斗11)和液体物料添加装置，用于添加第一速凝剂和水；井下速凝剂加注***20包括依次连接的井下管道21、第二速凝剂添加装置、布料管道27和充填区域28。Please refer to Figure 1, the present application provides a paste quick-setting filling system, including: a ground slurry system 10 and an underground quick-setting agent filling system 20; the ground slurry system 10 includes an aggregate adding device (such as the aggregate weighing bucket 11 in Figure 1) and a liquid material adding device, which are used to add a first quick-setting agent and water; the underground quick-setting agent filling system 20 includes an underground pipeline 21, a second quick-setting agent adding device, a material distribution pipeline 27 and a filling area 28 connected in sequence.
如此设置，主要制浆设备均设置于地面，安全性和操作便利性高，也无需大批量向井下运料，节省人力物力及井下作业空间。将膏体的骨料以及部分速凝剂(第一速凝剂)与水混合，得到流动性较好的第一速凝剂膏体，该膏体能够满足在与第二速凝剂混合前，膏体的速凝时间大于1h，更重要的是满足混合前流动性佳，即坍落度大于260mm，以保证膏体的流速，并防止堵塞；在实际操作中，可根据第一速凝剂膏体的输送路线长度和流动速度，计算其与第二速凝剂膏体混合时所需的时间，进而设计第一速凝剂的种类和添加量。当第一速凝剂膏体快流动至充填区域时，即在布料管 道27入口处，增设第二速凝剂添加装置，使得剩余部分的速凝剂进入膏体输送管道，与第一速凝剂膏体混合，为了提高混合均匀性，在管道上设置管道型混料器26，得到混合膏体。第二速凝剂的种类和添加量根据第一速凝剂膏体混合时的状态确定，使其满足第一速凝剂和第二速凝剂混合后，混合膏体的速凝时间缩短至5-30min，优选为5-20min，更优选为5-15min,更优选为5-10min。With this arrangement, the main slurry-making equipment is all located on the ground, which is highly safe and easy to operate. There is no need to transport materials underground in large quantities, saving manpower, material resources and underground working space. The aggregate of the paste and part of the accelerating setting agent (the first accelerating setting agent) are mixed with water to obtain a first accelerating setting agent paste with good fluidity. The paste can satisfy the requirement that the quick-setting time of the paste is greater than 1h before mixing with the second accelerating setting agent. More importantly, it satisfies the requirement that the fluidity before mixing is good, that is, the slump is greater than 260mm, so as to ensure the flow rate of the paste and prevent blockage. In actual operation, the time required for mixing the first accelerating setting agent paste with the second accelerating setting agent paste can be calculated based on the length of the conveying route and the flow rate of the first accelerating setting agent paste, and then the type and addition amount of the first accelerating setting agent can be designed. When the first accelerating setting agent paste is about to flow to the filling area, that is, in the distribution pipe At the entrance of the channel 27, a second accelerating agent adding device is added, so that the remaining part of the accelerating agent enters the paste delivery pipeline and is mixed with the first accelerating agent paste. In order to improve the mixing uniformity, a pipeline type mixer 26 is set on the pipeline to obtain a mixed paste. The type and amount of the second accelerating agent are determined according to the state of the first accelerating agent paste when mixed, so that after the first accelerating agent and the second accelerating agent are mixed, the quick setting time of the mixed paste is shortened to 5-30 minutes, preferably 5-20 minutes, more preferably 5-15 minutes, and more preferably 5-10 minutes.
本申请骨料可选自煤矸石(或风积沙)、粉煤灰、硅酸盐水泥，膏体质量浓度在70～82％之间，矸石骨料粒径一般的小于等于10mm，膏体中，煤矸石(或风积沙)、粉煤灰、硅酸盐水泥及水的质量比约为6：1：1：2。在此基础上，添加第一速凝剂和第二速凝剂。The aggregate of the present application can be selected from coal gangue (or aeolian sand), fly ash, and silicate cement, the paste mass concentration is between 70% and 82%, the particle size of the gangue aggregate is generally less than or equal to 10 mm, and the mass ratio of coal gangue (or aeolian sand), fly ash, silicate cement and water in the paste is about 6:1:1:2. On this basis, the first accelerator and the second accelerator are added.
具体地，液体物料添加装置包括依次连接的第一速凝剂储罐12、第一加注泵13、第一电磁阀14、第一流量计15和水称量斗16，通过第一电磁阀14和第一流量计15控制第一速凝剂的添加量。称重***误差小于等于5kg/m3。进一步的，地面制浆***10还包括分别与骨料添加装置和液体物料添加装置相连的混料装置17；混料装置17通过充填泵18及地面管道与井下管道21相连。第一速凝剂从第一速凝剂储罐12定量添加至水称量斗16，添加方式为泵压管道输送，第一流量计15的信号接入到地面充填集中监控***，便于对充填工艺参数进行智能调控。Specifically, the liquid material adding device includes a first accelerator storage tank 12, a first filling pump 13, a first solenoid valve 14, a first flowmeter 15 and a water weighing bucket 16 connected in sequence, and the addition amount of the first accelerator is controlled by the first solenoid valve 14 and the first flowmeter 15. The weighing system error is less than or equal to 5kg/ m3 . Furthermore, the ground pulping system 10 also includes a mixing device 17 connected to the aggregate adding device and the liquid material adding device respectively; the mixing device 17 is connected to the downhole pipeline 21 through a filling pump 18 and a ground pipeline. The first accelerator is quantitatively added from the first accelerator storage tank 12 to the water weighing bucket 16, and the adding method is pump pressure pipeline transportation. The signal of the first flowmeter 15 is connected to the ground filling centralized monitoring system, which is convenient for intelligent control of the filling process parameters.
第二速凝剂添加装置包括依次连接的第二速凝剂储罐22、第二加注泵23、第二电磁阀24、第二流量计25和管道型混料器26；管道型混料器26设置于井下管道21和布料管道27的连接部位。第二速凝剂在膏体输送干线管道的末端添加至管道型混料器26，即，布料管道27的入口处，其距布料管道27的出料口≤200m，例如为100-180m中的一个点值，目的是减小混合膏体的流动时间，从而防止其速凝发生堵塞。第二电磁阀24和第二流量计25也通过控制器控制，计量信号接入到地面充填集中监控***，保证精确配比，速凝时间可控。The second accelerator adding device includes a second accelerator storage tank 22, a second filling pump 23, a second solenoid valve 24, a second flowmeter 25 and a pipeline mixer 26 which are connected in sequence; the pipeline mixer 26 is arranged at the connection part of the downhole pipeline 21 and the material distribution pipeline 27. The second accelerator is added to the pipeline mixer 26 at the end of the paste conveying trunk pipeline, that is, at the entrance of the material distribution pipeline 27, which is ≤200m away from the discharge port of the material distribution pipeline 27, for example, a point value in 100-180m, in order to reduce the flow time of the mixed paste, thereby preventing its rapid setting from being blocked. The second solenoid valve 24 and the second flowmeter 25 are also controlled by the controller, and the metering signal is connected to the ground filling centralized monitoring system to ensure accurate proportioning and controllable rapid setting time.
特别地，充填***还包括第一速凝剂膏体输送能力监控***，通过硬件监测和软件计算，实时监测第一速凝剂膏体的流速和流量，以确定第二速凝剂的添加量。In particular, the filling system also includes a first accelerating setting agent paste conveying capacity monitoring system, which monitors the flow rate and flow of the first accelerating setting agent paste in real time through hardware monitoring and software calculation to determine the addition amount of the second accelerating setting agent.
充填***还包括设置于充填区域28的料浆状态和料位监测装置，用 于观测混合膏体的流动状态。主要由监控摄像头、料位计、控制器组成。可直观监测混合膏体的流动状态，及时监测料浆料位并反馈到地面集中监控***，实现高充实率充填。The filling system also includes a slurry state and material level monitoring device arranged in the filling area 28, which is used to monitor the slurry state and material level. It is used to observe the flow state of the mixed paste. It is mainly composed of monitoring cameras, level meters, and controllers. It can visually monitor the flow state of the mixed paste, monitor the slurry level in time and feed it back to the ground centralized monitoring system to achieve high filling rate.
本申请还提供一种膏体速凝充填工艺，采用以上任一项膏体速凝充填***，包括以下步骤：The present application also provides a paste quick-setting filling process, which uses any of the above paste quick-setting filling systems and includes the following steps:
S1.将膏体全部骨料和第一速凝剂及水从地面制浆***10混合得到第一速凝剂膏体，然后输送至井下管道21；S1. The paste is mixed with all the aggregates and the first accelerating agent and water from the ground slurry system 10 to obtain the first accelerating agent paste, which is then transported to the downhole pipeline 21;
S2.将第二速凝剂通过第二速凝剂添加装置输送至布料管道27的入口，并与第一速凝剂膏体混合，然后通过布料管道27输送至充填区域28；其中，第一速凝剂的种类及添加量根据第一速凝剂膏体的流动时间确定，以确保第一速凝剂膏体与第二速凝剂混合前的坍落度大于150mm；第二速凝剂的种类及添加量根据第一速凝剂膏体的流速和流量确定，以确保混合膏体的速凝时间大于其从布料管道27入口流动至充填区域28的时间。S2. The second accelerator is transported to the inlet of the distribution pipe 27 through the second accelerator adding device, mixed with the first accelerator paste, and then transported to the filling area 28 through the distribution pipe 27; wherein, the type and addition amount of the first accelerator are determined according to the flow time of the first accelerator paste to ensure that the slump of the first accelerator paste before mixing with the second accelerator is greater than 150 mm; the type and addition amount of the second accelerator are determined according to the flow velocity and flow rate of the first accelerator paste to ensure that the quick-setting time of the mixed paste is greater than the time it takes to flow from the inlet of the distribution pipe 27 to the filling area 28.
具体地，根据第一速凝剂膏体的流动路径总长度及管道直径，对第一速凝剂的种类及添加量进行设计，以使第一速凝剂膏体与第二速凝剂混合前的坍落度大于260mm。此过程的计算，又会因为第一速凝剂的添加对第一速凝剂膏体的流速造成影响，进而影响其流动时间，如此即可对其种类和用量进行调控以对其与第二速凝剂混合时的状态进行调控。接着根据混合膏体的流动路径总长度及管道直径，以及第一速凝剂膏体的流速和流量，确定第二速凝剂的种类及添加量，以使混合膏体进入充填区域28后在10min内速凝；在满足上述约束条件下，使第一速凝剂的用量最大化，第二速凝剂的用量最小化，即为速凝充填的最优实施方式。如此设置，能够尽可能的减小井下速凝剂用量，从而减小向井下搬运物料量，节约人力物力。Specifically, according to the total length of the flow path of the first quick-setting agent paste and the diameter of the pipeline, the type and amount of the first quick-setting agent are designed so that the slump of the first quick-setting agent paste before mixing with the second quick-setting agent is greater than 260 mm. The calculation of this process will affect the flow rate of the first quick-setting agent paste due to the addition of the first quick-setting agent, and then affect its flow time, so that its type and amount can be regulated to regulate the state when it is mixed with the second quick-setting agent. Then, according to the total length of the flow path of the mixed paste and the diameter of the pipeline, as well as the flow rate and flow rate of the first quick-setting agent paste, the type and amount of the second quick-setting agent are determined so that the mixed paste can be quickly set within 10 minutes after entering the filling area 28; under the above constraints, the amount of the first quick-setting agent is maximized and the amount of the second quick-setting agent is minimized, which is the optimal implementation method of quick-setting filling. Such a setting can reduce the amount of underground quick-setting agent as much as possible, thereby reducing the amount of materials transported underground and saving manpower and material resources.
在一些实施方式中，第一速凝剂和第二速凝剂为速凝剂配方中的不同组分，通过控制各组分的分批混合，实现对混合膏体速凝时间的调控。例如选用双组分速凝剂配方，第一速凝剂和第二速凝剂分别为其中的一个组分，当两种组分混合后，速凝效果更佳。In some embodiments, the first accelerating setting agent and the second accelerating setting agent are different components in the accelerating setting agent formula, and the quick setting time of the mixed paste is regulated by controlling the batch mixing of each component. For example, a two-component accelerating setting agent formula is selected, and the first accelerating setting agent and the second accelerating setting agent are respectively one of the components. When the two components are mixed, the quick setting effect is better.
本申请速凝剂选自氢氧化钾、氢氧化钠、碳酸钠、碳酸钾、硅酸钠、氢氧化铝、三乙醇胺、铝酸钠、硫酸铝中的一种或多种组成的水溶液。优 选分别为铝酸钠和硫酸钠中的一种，同时添加有三乙醇胺。The accelerating setting agent of the present application is an aqueous solution composed of one or more of potassium hydroxide, sodium hydroxide, sodium carbonate, potassium carbonate, sodium silicate, aluminum hydroxide, triethanolamine, sodium aluminate, and aluminum sulfate. Sodium aluminate and sodium sulfate are selected, and triethanolamine is added.
在一个具体实施方式中，本申请充填***的第一速凝剂该膏体管道总长为2500m，布料管道27的长度为100m，管道直径为200mm，输送能力为120-150m3/h，第一速凝剂为铝酸钠和三乙醇胺组成的混合水溶液，第二速凝剂为硫酸铝水溶液。采用上述充填工艺进行充填，第一速凝剂用量为2.2kg/m3，当第一速凝剂膏体流动至布料管道27处时，坍落度为260mm，第二速凝剂用量为5.8kg/m3，混合后，速凝时间为12min，待流动至充填区域28后，可在10min内凝固。In a specific embodiment, the total length of the first accelerator paste pipeline of the filling system of the present application is 2500m, the length of the distribution pipeline 27 is 100m, the pipeline diameter is 200mm, the conveying capacity is 120-150m3 /h, the first accelerator is a mixed aqueous solution of sodium aluminate and triethanolamine, and the second accelerator is an aqueous solution of aluminum sulfate. The above filling process is used for filling, the amount of the first accelerator is 2.2kg/ m3 , when the first accelerator paste flows to the distribution pipeline 27, the slump is 260mm, the amount of the second accelerator is 5.8kg/ m3 , after mixing, the quick setting time is 12min, and after flowing to the filling area 28, it can solidify within 10min.
而直接将速凝剂一次加入时，要达到本申请所述的速凝时间，速凝剂总添加量需要达到12kg/m3，可见，本申请通过分批次和分时间段添加速凝剂，既能减小速凝剂井下用量，又能减小总用量，因此实际应用价值很可观。When the accelerator is added at once, the total amount of the accelerator added needs to reach 12 kg/m 3 to achieve the accelerated setting time described in the present application. It can be seen that the present application can reduce both the amount of accelerator used underground and the total amount by adding the accelerator in batches and time periods, so the actual application value is considerable.
综上所述，本申请为速凝充填提供了一种精确化的调控***，以地面制浆为主，井下添加速凝剂为辅，既能节约成本，提高作业安全性，又能提高速凝充填的可控性和速度，而且由于第一速凝膏体在输送过程中开始有一个缓冲时间，因此再与第二速凝剂混合后，既能加快凝固，又能节约速凝剂总用量，从而减小速凝剂对膏体强度，特别是28d抗压强度的影响。In summary, the present application provides a precise control system for rapid setting filling, which is mainly based on ground slurrying and supplemented by adding quick-setting agent underground. It can not only save costs and improve operation safety, but also improve the controllability and speed of rapid setting filling. Moreover, since the first quick-setting paste has a buffer time at the beginning of the transportation process, after mixing with the second quick-setting agent, it can not only accelerate the solidification, but also save the total amount of quick-setting agent, thereby reducing the influence of the quick-setting agent on the paste strength, especially the 28d compressive strength.
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。 Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (10)

  1. 一种膏体速凝充填***，包括：地面制浆***和井下速凝剂加注***；其中，所述地面制浆***包括骨料添加装置和液体物料添加装置，用于添加第一速凝剂和水；所述井下速凝剂加注***包括依次连接的井下管道、第二速凝剂添加装置、布料管道和充填区域；所述第一速凝剂和所述第二速凝剂混合前，膏体的速凝时间大于1h；所述第一速凝剂和所述第二速凝剂混合后，膏体的速凝时间缩短至5-30min。A paste quick-setting filling system comprises: a ground slurry system and a downhole quick-setting agent injection system; wherein the ground slurry system comprises an aggregate adding device and a liquid material adding device for adding a first quick-setting agent and water; the downhole quick-setting agent injection system comprises a downhole pipeline, a second quick-setting agent adding device, a material distribution pipeline and a filling area connected in sequence; before the first quick-setting agent and the second quick-setting agent are mixed, the quick-setting time of the paste is greater than 1 hour; after the first quick-setting agent and the second quick-setting agent are mixed, the quick-setting time of the paste is shortened to 5-30 minutes.
  2. 根据权利要求1所述的膏体速凝充填***，其中，所述液体物料添加装置包括依次连接的第一速凝剂储罐、第一加注泵、第一电磁阀、第一流量计和水称量斗，通过所述第一电磁阀和第一流量计控制所述第一速凝剂的添加量。The paste quick-setting filling system according to claim 1, wherein the liquid material adding device comprises a first quick-setting agent storage tank, a first filling pump, a first solenoid valve, a first flow meter and a water weighing bucket connected in sequence, and the addition amount of the first quick-setting agent is controlled by the first solenoid valve and the first flow meter.
  3. 根据权利要求1所述的膏体速凝充填***，其中，所述第二速凝剂添加装置包括依次连接的第二速凝剂储罐、第二加注泵、第二电磁阀、第二流量计和管道型混料器；所述管道型混料器设置于所述井下管道和布料管道的连接部位。The paste quick-setting filling system according to claim 1, wherein the second quick-setting agent adding device comprises a second quick-setting agent storage tank, a second filling pump, a second solenoid valve, a second flow meter and a pipeline mixer connected in sequence; the pipeline mixer is arranged at the connection part of the downhole pipeline and the material distribution pipeline.
  4. 根据权利要求1所述的膏体速凝充填***，其中，所述地面制浆***还包括分别与所述骨料添加装置和液体物料添加装置相连的混料装置；所述混料装置通过充填泵及地面管道与所述井下管道相连。According to the paste rapid-setting filling system of claim 1, wherein the ground slurrying system further comprises a mixing device connected to the aggregate adding device and the liquid material adding device respectively; the mixing device is connected to the downhole pipeline via a filling pump and a ground pipeline.
  5. 根据权利要求1-4中任一项所述的膏体速凝充填***，其中，所述充填***还包括第一速凝剂膏体输送能力监控***，用于实时监测第一速凝剂膏体的流速和流量，以确定所述第二速凝剂的添加量。The paste quick-setting filling system according to any one of claims 1 to 4, wherein the filling system further comprises a first quick-setting agent paste conveying capacity monitoring system for real-time monitoring of the flow rate and flow rate of the first quick-setting agent paste to determine the addition amount of the second quick-setting agent.
  6. 根据权利要求1-4中任一项所述的膏体速凝充填***，其中，所述充填***还包括设置于所述充填区域的料浆状态和料位监测装置，用于观测混合膏体的流动状态。The paste rapid-setting filling system according to any one of claims 1 to 4, wherein the filling system further comprises a slurry state and material level monitoring device arranged in the filling area, for observing the flow state of the mixed paste.
  7. 一种膏体速凝充填工艺，采用权利要求1-6中任一项所述的膏体速凝充填***，包括以下步骤：A paste rapid setting filling process, using the paste rapid setting filling system described in any one of claims 1 to 6, comprising the following steps:
    S1.将膏体全部骨料和第一速凝剂及水从地面制浆***混合得到第一速凝剂膏体，然后输送至井下管道；S1. Mix all the aggregates of the paste, the first accelerating agent and water from the ground slurry system to obtain the first accelerating agent paste, and then transport it to the downhole pipeline;
    S2.将第二速凝剂通过第二速凝剂添加装置与所述第一速凝剂膏体混合，然后通过所述布料管道输送至充填区域； S2. The second accelerating agent is mixed with the first accelerating agent paste through the second accelerating agent adding device, and then transported to the filling area through the material distribution pipeline;
    其中，所述第一速凝剂的添加量根据第一速凝剂膏体的流动时间确定，以确保所述第一速凝剂膏体与所述第二速凝剂混合前的坍落度大于260mm；所述第二速凝剂的添加量根据所述第一速凝剂膏体的流速和流量确定，以确保混合膏体的速凝时间大于其从混合装置出口流动至所述充填区域的时间。Among them, the addition amount of the first accelerator is determined according to the flow time of the first accelerator paste to ensure that the slump of the first accelerator paste before mixing with the second accelerator is greater than 260 mm; the addition amount of the second accelerator is determined according to the flow velocity and flow rate of the first accelerator paste to ensure that the quick-setting time of the mixed paste is greater than the time it takes for the mixed paste to flow from the outlet of the mixing device to the filling area.
  8. 根据权利要求7所述的膏体速凝充填工艺，其中，所述第一速凝剂和第二速凝剂组分不同，通过分两个批次添加，控制添加量实现对最终膏体速凝时间的调控。The paste rapid setting filling process according to claim 7, wherein the first accelerating agent and the second accelerating agent have different components, and are added in two batches and the addition amount is controlled to achieve regulation of the final paste rapid setting time.
  9. 根据权利要求7所述的膏体速凝充填工艺，其中，所述第一速凝剂和第二速凝剂的总用量为5-10kg/m3。The paste rapid setting filling process according to claim 7, wherein the total usage of the first accelerating agent and the second accelerating agent is 5-10 kg/m 3 .
  10. 根据权利要求8所述的膏体速凝充填工艺，其中，根据所述第一速凝剂膏体的流动路径总长度及管道直径，对所述第一速凝剂的种类及添加量进行设计，以使所述第一速凝剂膏体与所述第二速凝剂混合前的坍落度大于260mm；根据所述混合膏体的流动路径总长度及管道直径，以及所述第一速凝剂膏体的流速和流量，确定所述第二速凝剂的种类及添加量，以使所述混合膏体进入所述充填区域后在10min内速凝；在满足上述约束条件下，使所述第一速凝剂和第二速凝剂的总用量最小化。 The paste rapid-setting filling process according to claim 8, wherein the type and addition amount of the first accelerator are designed according to the total length of the flow path of the first accelerator paste and the pipe diameter, so that the slump of the first accelerator paste before mixing with the second accelerator is greater than 260 mm; the type and addition amount of the second accelerator are determined according to the total length of the flow path of the mixed paste and the pipe diameter, as well as the flow rate and flow rate of the first accelerator paste, so that the mixed paste sets quickly within 10 minutes after entering the filling area; and the total amount of the first accelerator and the second accelerator is minimized while satisfying the above constraints.
PCT/CN2023/106468 2022-11-28 2023-07-10 Quick-setting filling process and system for paste WO2024113877A1 (en)

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