CN103306677B - Rapid rock cross-cut coal uncovering process and outburst prevention method - Google Patents
Rapid rock cross-cut coal uncovering process and outburst prevention method Download PDFInfo
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Abstract
The invention relates to a rapid rock cross-cut coal uncovering process and an outburst prevention method, which specifically comprises the steps of constructing a leading borehole through a roadway side drill site during rock roadway excavation, determining the gas pressure of a coal seam by constructing a cross-layer borehole and rapidly determining parameters such as gas content, coal body mechanical property and the like by sampling an extraction borehole while not influencing rock roadway construction and intercepting and extracting the gas of a coal layer to be uncovered in advance, so as to realize multi-index prediction of the outburst risk of the coal seam; besides the gas outburst prevention measure of relevant regulations and standard requirements of coal uncovering, a targeted coal-rock body solidification measure is added, so that after the outburst of the rock cross-cut coal uncovering working face is completely eliminated, the rock cross-cut coal uncovering is tunneled by a fully mechanized excavating machine, and the rapid rock cross-cut coal uncovering is realized. The whole set of coal uncovering process and the outburst prevention method are used for a tunnel of an experimental mine 937m, 18 layers of coal are uncovered in total, the whole construction period is shortened by 1.63 years, and the expected coal uncovering time is one third. The method has the advantages of simple and convenient operation, safe construction, short coal uncovering overall time, good outburst prevention effect and wide practicability.
Description
[technical field]
The present invention relates to crossdrift rapid uncovering coal technology, in particular for coal and gas prominent danger forecasting before stone door punching coal and the method for preventing and treating stone door punching coal work plane coal and gas prominent.
[background technology]
Coal and gas prominent is the serious natural calamity of one in coal production process, roadway facility can be destroyed during generation, destroy mine ventilation system, coal petrography and gas are poured out, impact is hurted sb.'s feelings, coal stream buries people, gas the personnel that cause suffocate, and even causes serious gas and coal-dust explosion, causes massive losses such as producing interruption, casualties.
Stone door punching coal, namely crossdrift starts outside the end (top) slate layer and coal seam normal distance 10m, enters or pass whole operation process of projecting coal bed top (end) plate (normal distance is greater than 2m).In coal and gas prominent, the outburst hazard of stone door punching coal is maximum, intensity of outburst is also the highest, stone door punching coal is because of himself characteristic, normally open up also not by the coal seam disclosed in new mine capital construction or new height, newly exploiting field, its gas pressure, stress are all in a state of nature, when exposing these coal seams, work plane enters suddenly softer coal seam by hard coal seam, work plane front stress concentrates scope easily to undergo mutation, these be all coal and gas prominent create necessary and favourable condition.According to statistics, it is higher than other tunnels 40 times to there is outstanding number of times in stone door punching coal, and higher than stope more than 100 times, therefore, stone door punching coal the most easily coal and gas prominent occurs.Outstanding feature occurs stone door punching coal is that intensity is large, gas amount large, it is wide to involve, and large to the destruction of down-hole, harm is serious.
Coal and gas prominent is the complicated dynamic phenomenon that a kind of multifactor acting in conjunction produces, in the real work of stone door punching coal, an index should do not used separately to carry out outburst prediction, because the mensuration of an index is difficult to by the impact of several factors survey standard, and be also different to this index of same projecting coal bed different location, an alone index judges often with very large contingency, its danger of very difficult Accurate Prediction, and easily cause error in judgement, therefore multifactor acting in conjunction effect must be considered in stone door punching coal.
China's coal seam group with near interval is widely distributed.The overwhelming majority regional coal seam, the Guizhou Province number of plies is many, and the main mining coal seam number of plies is 3 ~ 20 layers; Minable coal seam varied in thickness large (0.57 ~ 3.7m), coal seam interlamellar spacing is little, and belongs to high methane (10 ~ 39.89m more
3/ t) low-permeable (8.7 × 10
-6mD) coal seam.In other mining areas of China, as Pingdingshan Coal Mine, newly-formed university, Huainan Mining Area, Datong Mine Area also exist high methane low-permeable coal seam group with near interval.Adopt crossdrift to contact each seam mining, often, stone door punching coal control coal and gas prominent workload is large for stone door punching coal.According to the regulation of " control coal and gas prominent specifies " (hereinafter referred to as " protrusion-dispelling specifies ") and " crossdrift exposes coal and gas prominent coal seam program technic condition " (MT/T955-2005), one time stone door punching coal (comprise pressure measurement of drilling, take out coal-bed gas etc. in advance) at least needs the cost time of 2 ~ 3 months.Exposed coal required time is long, by the construction progress of the excavation replacement and New Built Mine that directly affect mine main.For some collieries, Guizhou Province, tunnel a crossdrift and need wear which floor even tens layers of minable coal seam, each coal seam all in various degree there is coal and gas prominent danger, if in strict accordance with the requirement exposed coal of " protrusion-dispelling specifies " and " crossdrift exposes coal and gas prominent coal seam program technic condition ", then a crossdrift of constructing just needs the time of 2 ~ 3 years.Visible, research and find one not only safety but also exposed coal technological process control is extremely important very fast, and extremely urgent.
At present, the subject matter of domestic and international stone door punching coal protrusion-dispelling technology existence is as described below:
(1) by " crossdrift exposes coal and gas prominent coal seam program technic condition ", projecting coal bed gas pressure measurement work must be carried out before exposed coal, limit to by domestic and international manometric technique and equipment at present, ensureing under the prerequisite measuring coal-bed gas pressure result, adopting direct method pressure measurement required time longer.Therefore, realizing determination of coal seam gas pressure when not affecting exposed coal operation is the prerequisite realizing rapid uncovering coal.
(2) when projecting coal bed do not possess direct pressure measurement, can adopt measure coal seam gas-bearing capacity to predict Coal Seam Outburst Hazard.In August, 2009, the enforcement of " protrusion-dispelling specifies ", clearly using an important indicator that coal seam gas-bearing capacity is predicted as Coal Seam Outburst Hazard.But the size of coal seam gas-bearing capacity and distribution are subject to the combined influence of the factors such as coal evolution grade, geologic process, buried depth, are difficult to accurately measure.Coal seam gas-bearing capacity is obtained in order to realize Quick Measuring, in recent years, some R&D institutions have also carried out research in various degree, the WP-1 rapid measurement device for gas content etc. that the direct determinator of DGC gas bearing capacity of current You Zhong Mei Kegong Chongqing academy development and Shenyang academy (former coal academy of sciences Fushun branch) research and develop.Wherein, the direct determinator of DGC gas bearing capacity comprises the steps such as the reckoning of gas loss amount, the mensuration of coal core desorption of mash gas amount, the mensuration pulverizing desorption of mash gas amount and the calculating of normal pressure remaining quantity, its time used is relatively long, operation is loaded down with trivial details, but can ensure the accuracy of mensuration; WP-1 rapid measurement device for gas content changes in time according to coal sample desorption of mash gas speed and meets power function relationship and calculate gas bearing capacity, and its time used shorter, operation is simple, but measurement result accuracy has much room for improvement.Therefore, operation short to required time simply, and can ensure that the gas bearing capacity rapid assay methods research of industrialness demand and scientific research is very important.
(3), by present stage exposed coal technique and technical requirements, in stone door punching coal work plane tunneling process, have coal and gas prominent danger just to take the measure of pump drainage methane through prediction, centre needs the time of wait longer.Recognize this point, before carrying out projecting coal bed stone door punching coal, gas shifts to an earlier date the stopped flow technique research of Yu Chouji lane side is necessary.
(4) stone door punching coal common technology is blown out at a distance, and especially explosion exposed coal easily brings out coal and gas prominent accident.Therefore how evading because blowing out the postponing bursting that causes also is the problem needing in stone door punching coal technique to solve.
To sum up, research one is safety but also exposed coal technological process control fast not only, and the too many time that can solve spent by conventional exposed coal means is the task of top priority.
[summary of the invention]
The object of the invention is to overcome the deficiencies in the prior art, provide one to realize quick stone door punching coal technique and anti-burst method.
The present invention realizes by the following method:
A kind of stone door punching coal and anti-burst method fast, is characterized in that:
A. take out coal-bed gas in advance in advance, realize the coal seam extinction in exposed coal region, for crossdrift rapid uncovering coal creates necessary condition;
B. adopt the outburst hazard in multi objective prediction coal seam, improve the accuracy of prediction;
C. coal and rock solidification anti-burst method is adopted, for crossdrift rapid uncovering coal provides safety curtain;
D. fully-mechanized digging machine is in the application of stone door punching coal work plane, achieves the breakthrough of stone door punching coal technique, substantially reduces the time of stone door punching coal.
A kind of stone door punching coal and anti-burst method fast, its detailed step is:
A. gas pre-drainage is helped to dam in lane, before stone door punching coal, dam take out coal-bed gas data of holes drilled in advance by appropriate design, Optimization deployment lane side, implement to take out in advance in advance to stone door punching coal work plane coal-bed gas, and make the equal > 30% of pre-pumping rate, realize treating that the outburst hazard of exposed coal layer reduces or eliminates, the gas pressure of exposed coal work plane and content are down to and allow in safe range, and be unlikely to affect tunnel and normally tunnel, for crossdrift rapid uncovering coal creates good condition;
B. coal-bed gas pressure Fast Measurement.In normal stone drifting process, two help " hangers " (construction drill site), realize the mechanics parameter of projecting coal bed gas pressure measurement and its Industrial Analysis of sampling determination and coal when not affecting normal driving;
C. seam gas content Fast Measurement, extraction borehole is helped to dam in the lane utilizing pressure tap or lane side drill site (being also hangers mode) to construct, every certain distance collection boring coal sample on-site measurement desorption of mash gas amount, then tinning, several groups that enchashment field desorption amount is large are sent experimental determination residual gas content, then go out gas bearing capacity according to correlation theory scientific algorithm.It is faster that the method measures specification for existing gas bearing capacity, realizes obtaining result in 1h, and can ensure that its result meets the reliability of Industrial Analysis, for exposed coal work plane outburst prediction;
D. the outburst hazard in multi objective prediction coal seam, changes the prediction of traditional stone door punching coal outburst hazard and adopts the polytropy of Individual forecast index existence and probabilistic shortcoming, develop into drilling cuttings desorption of mash gas index (K
1or Δ h
2) be main, the solid coefficient f of coal, coal seam gas-bearing capacity X
0etc. the outburst hazard that multi-parameter index is auxiliary synthetic determination stone door punching coal work plane, ensure the accuracy predicted the outcome, guarantee safe coal-openning, make the not outstanding rate of accuracy reached of prediction to 100%.
One realizes quick stone door punching coal technique and anti-burst method, and its concrete steps are:
A., before stone door punching coal, dam take out coal-bed gas data of holes drilled in advance by appropriate design, Optimization deployment lane side, implement to take out in advance in advance to stone door punching coal work plane coal-bed gas, and make the equal > 30% of pre-pumping rate, realize exposed coal region rapid outburst elimination;
B. when not affecting tunnelling speed, the gas pressure treating exposed coal layer has carried out Fast Measurement, and proposes gas bearing capacity rapid assay methods, realizes obtaining result in 1h, for exposed coal work plane outburst prediction;
C. use coal and rock curing technology, be used successfully to exposed coal work plane protrusion-dispelling, make coal mass strength improve more than 4.5 times; And innovate from protrusion-dispelling theory, when treating the complete extinction of work plane, take fully-mechanized digging machine to carry out exposed coal operation, safety tunnels 937m, and take off 18 layers of coal altogether, the overall exposed coal duration shortens 63%;
The step of described gas pressure, gas bearing capacity Fast Measurement is:
A. the position relationship in ocurrence of coal seam, inclination angle and tunnel is comprehensively analyzed, have chosen tunnelling to locate to about 50m before treating exposed coal layer, namely location arrangements drill site is applicable in both sides, tunnel, while construction layer-through drilling takes out front coal-bed gas to be taken off in advance, design pressure measuring drill hole carries out the mensuration (as shown in Figure 2) of the original gas pressure in coal seam, serves pressure measurement, driving is neglected neither;
B. pressure measuring drill hole is utilized to take coal sample to send the relevant parameter such as Industrial Analysis index, absorption constant a, b value of experimental determination coal seam residual gas content, coal; When tunnel pick is in stone door punching coal state to coal seam normal distance 10m, by to coal seam construction drill, get coal sample and load hermetically sealed can, the desorption of mash gas amount of coal sample in hermetically sealed can is directly measured in down-hole, records the time of desorb simultaneously, then according to desorption of mash gas amount and the relation of lost time, and coal sample in tank is weighed, calculate desorption of mash gas amount, then the residual gas content data of experimental determination and industrial index value before combining, thus determine seam gas content fast.
C. the method that the present invention relates to the another kind of coal seam gas-bearing capacity of judgement is fast:
1. first drill hole sampling, send laboratory to carry out the Industrial Analysis of coal, every physical features that must produce coal;
2. the prediction boring before can utilizing pressure measuring drill hole or exposed coal is got coal sample and carries out site desorption, directly measures desorption of mash gas amount, then by calculating gas loss amount;
3. according to volatile matter the defining the span of the residual gas content of coal according to coal in " Emit Quantity Prediction Methods In Coal Mines " (AQ1018-2006) appendix C, get the maximum residual gas content of in-scope, then add loss amount, desorption quantity, draw seam gas content equally fast; The method is compared to " coal seam gas-bearing capacity down-hole Direct Determination " (GBT23250-2009), eliminate the experimental determination residual gas content cycle the most complicated, consuming time, though the coal seam gas-bearing capacity value drawn is not very accurate, but meet Industrial Analysis and related science research completely), and according to the relation between gas bearing capacity and gas pressure, draw coal-bed gas pressure value, forecasting coal and gas outburst risk;
4. from apart from the overall process to exposed coal treating exposed coal layer normal 5m, multi-parameter (drilling cuttings desorption of mash gas index (K is adopted
1or Δ h
2) be main, the solid coefficient f of coal, coal seam gas-bearing capacity X
0combining) compound judges the outburst hazard in coal seam, avoids single index to predict the contingency that Coal Seam Outburst Hazard causes and insensitivity, further ensures accuracy and the reliability of outburst prediction, guarantee the safety of exposed coal.
Above-mentioned crossdrift rapid uncovering coal PROCESS SUMMARY is:
A. ocurrence of coal seam situation and the detection of gas index
1. detect: accurate detection work plane, apart from the distance in coal seam, prevents from wearing coal seam by mistake;
2. gas index prediction: adopt gas pressure, gas bearing capacity (and each coal-bed gas basic parameter inverting gas pressure of Binding experiment room mensuration), drilling cuttings desorption of mash gas index K
1or Δ h
2.
B. the technical measures of gas are prevented and treated
1. drill site layer-through drilling, work plane layer-through drilling, in advance pressure relief blow boring is adopted to carry out taking out in advance and discharging of exposed coal work plane coal-bed gas, eliminate or reduce the outburst danger in coal seam, reduce seam gas content, guarantee that the safety in coal seam is exposed in tunnel, stone door punching coal speed is improved on the basis not affecting tunnelling;
2. coal and rock solidification is for increasing coal body, country rock physical arrangement intensity, and the prevention such as metallic framework, advance support coal seam inbreak, in order to avoid cause other Gas Disaster because coal seam is caving.
C. Coal roadway driving technology is opened
Crossdrift is opened coal seam and was also comprised half coal road of crossdrift door to the exposed coal work completing whole crossdrift smoothly and crossed the overall process of the coal roadway tunneling after ort to top board (or base plate), and the main principle of this process is " diligent prediction, short drilling depth, strong supporting, fast driving, strict control reason ".
1. diligent prediction: after opening coal seam, the gas situation in the upper, middle and lower of work plane front 10m, the coal seam at left and right position is detected, as allowed drilling depth 5m without danger; Dangerous, then stop work one class or carry out advance borehole and supplement firedamp drainage;
2. short drilling depth: when crossing crossdrift door, controlled circulation drilling depth, blows out at a distance with the replacement of comprehensive pick driving, prevents from causing giving prominence to because blowing out caused collapsing;
3. strong supporting: is select effective support form; Two is reduce canopy spacing; Three is top, the tight back of the body of the back of the body real tunnel, side, carries out short distance excavating and short distance supporting safeguard procedures safely and effectively;
4. tunnel soon: through extinction measure, and measure of verifying safe and reliable after, strengthen coal and rock supporting, adopt fully-mechanized digging machine speedy drivage;
5. strict control reason: formulate strict organization and administration measure, stop gas accident.
Rapid uncovering coal operating procedure in above-mentioned as shown in Figure 3, under concrete division is shown in:
A. the first step: stone door punching coal
1. at construction of rock gangway to the position of coal seam normal distance 10m, at least 2 front prospecting bit holes of constructing, accurately verify the relative position in crossdrift work plane and coal seam, grasp the basic condition such as condition of coal seam occurrence, geological structure.
2. outside cross cut to coal seam normal distance 5m, arrange 5 prediction borings altogether, 1 is arranged along laneway midline, 1 boring is respectively arranged in the upper and lower, left and right in tunnel, the control range of boring is the outer 8m of crossdrift roadway workface outline line, i.e. top 8m, both sides 8m and below 8m (minimum guarantee 5m).Measure drilling cuttings desorption of mash gas index K
1or Δ h
2with the coal seams gas discharging quantity size of on-site measurement coal sample, the prediction outburst hazard in coal seam or the size of coal-bed gas.
3., when predicting dangerous property, do drill site at roadway's sides and beat layer-through drilling and carry out coal seam and take out measure in advance, work plane is taked to wear layer extraction borehole or run before to exhaust to drill a hole measure apart from normal distance 5m place, coal seam, the gas in extraction or discharge coal seam.And measure effect is tested and evaluates.Measure boring be specifically arranged in exposed coal before carry out detailed design again.
4., when construction of rock gangway is to distance normal distance 3m place, coal seam, firedamp drainage effect within the scope of tunnel repair is tested.When checking nothing danger or coal-bed gas obviously to reduce, " short drilling depth, strong supporting, fast driving, Bolt net and jet " construction technology is adopted to dig crossdrift to coal seam normal distance 2m; Otherwise, should take to supplement take out, bleeder off hole eliminates danger.
5. at crossdrift distance normal distance 2m place, coal seam, testing property of coal-bed gas outburst hazard is predicted.Without dangerous, take fully-mechanized digging machine to tunnel and open coal seam; Otherwise, should take to supplement take out, bleeder off hole eliminates exposed coal work plane outburst danger.
B. second step: half coal road and the coal roadway tunneling of crossing crossdrift door
The basic principle of half coal road and coal roadway tunneling gas outburst prevention treatment and gas control of crossing crossdrift door is: diligent inspection, short drilling depth, strong supporting, fast driving, strict control reason, Bolt net and jet.
In tunneling process, every cycle arrangement 5 boring, tests to the upper, middle and lower of work plane front 8 ~ 10m, the outburst hazard at left and right position, and middle part boring is consistent with tunneling direction, and is arranged in soft layering as far as possible; By distance tunnel outline line about 0.5m in the drilling hole at position, upper and lower, left and right, whole hole is at the outer 3m of tunnel outline line.As without dangerous, then tunnel after retaining 5m barrier pillar; Dangerous, construction run before to exhaust to drill a hole outburst prevention measures is until eliminate danger.
Prediction and validity check index adopt drilling cuttings desorption of mash gas index K
1with Δ h
2and coal seam gas-bearing capacity index.Index threshold is chosen with reference to the regulation of " protrusion-dispelling specifies ", K
1value gets 0.4cm
3/ (g.min
0.5), Δ h
2get 200Pa, gas bearing capacity index threshold gets 8m
3/ t.
In work plane measure through validity check without after eliminating outburst danger within the scope of outburst danger, tunnel outline line 8m, work plane P. drechsleri drilling depth controls at 0.8 ~ 1.6m, adopt coal body solidification gas preventing and control technology and adopt close type metal support, spacing 0.4 ~ 0.6m, support must carry out firmly chain.Adopt grid canopy to add " U " type i iron to have carried out tunnel strengthening supporting to digging tunnel, and laid 1 inch metal tube more than the skewback line of driving face front, adopt the wire lath back of the body sternly to carry on the back reality, and carry out gunite in time.
The invention has the advantages that:
From theory in conjunction with practical study domestic and international exposed coal technique at present, a whole set of distinctive pointed quick stone door punching coal Forecasting Methodology is proposed, and crossdrift rapid uncovering coal protrusion-dispelling technology.Coal and Gas Outbursts Prediction technology proposed by the invention and anti-burst method comprise the quick manometric technique of stone door punching coal, gas bearing capacity rapid assay methods and lane and help to dam pre-draining borehole placement technique, change that Individual forecast is multi-parameter, overall target carries out judging, integrated forecasting stone door punching coal gas outburst risk, forecasting accuracy is improved more, guarantee safe coal-openning, making the outstanding rate of accuracy reached of prediction to 100%, is a brand-new exposed coal technology.In addition, " diligent prediction, short drilling depth, strong supporting, fast driving, strict control reason, the Bolt net and jet " gas outburst prevention treatment that the method proposes and the basic principle of gas control, it is zero that exposed coal process can be made to draw whole, implement prediction and extinction measure step by step, add the reliability of measure, decrease the long drilled holes constructional difficulties at exposed coal work plane place and problem not in place of constructing, accomplished exposed coal safely and fast, safety precaution theory is obtained higher level on annotation.Finally, the present invention improves original protrusion-dispelling theory, does not confine in present stage protrusion-dispelling natural mode, namely first stone door punching coal work plane coal and rock is solidified, and under treating the prerequisite of its complete extinction, adopts fully-mechanized digging machine driving, thus realizes object that is safe and efficient, rapid uncovering coal.
[accompanying drawing explanation]
Fig. 1 is quick stone door punching coal technique and anti-burst method route map;
The side drill site pressure measurement of Tu2Wei lane and pre-draining borehole arrange schematic diagram;
Fig. 3 is quick stone door punching coal technique and protrusion-dispelling flow chart.
[detailed description of the invention]
The detailed description of the invention of a kind of quick stone door punching coal technique of the present invention and anti-burst method is below provided.
Embodiment 1
The first step: binding tests mine treats exposed coal layer gas bearing and condition of coal seam occurrence, distance appropriate location, coal seam (50 ~ 100m) place starts two and helps drill site of constructing, and then designs gas pre-drainage data of holes drilled;
Second step: according to the arrangement principle of pre-draining borehole, calculate extraction time, extraction amount and gas pumping rate, comprising measuring drilling gas flow and Gas characteristic parameter targetedly, extrapolate gas permeability of coal seam size further, then according to coal bed gas extraction complexity determine the extraction time and, the hole pumping and mining radius of influence etc., to provide foundation for the not good layout pressure relief blow of extinction validity check from now on hole;
3rd step: according to above-mentioned steps, calculates the pre-pumping rate of coal-bed gas; And utilize lane to help drill site to measure such as gas pressure, gas bearing capacity etc. to compose and deposit parameter, and the mechanical property parameter etc. of coal body;
4th step: the application of coal and rock solidification protrusion-dispelling technology; This step need consider choosing of consolidation liquid and grouting pump, carries out grouting amount calculating according to injected hole and quantity, and carries out inlet well parameter designing and the technical safety measures of establishment mortar depositing construction, then constructs according to slip casting solidification construction technology;
5th step: adopt multi objective to carry out Coal and Gas Outbursts Prediction and verifying outburst prevention effect; Comprise Desorption Index for Drill Cuttings K
1(or Δ h
2), the solid coefficient f of coal, coal seam gas-bearing capacity X
0(Binding experiment room measure take off the basic parameter inverting coal-bed gas pressure P in each coal seam), gas diffusion initial speed Δ P etc.;
6th step: inspection coal and rock solidification protrusion-dispelling effect; Investigate coal (rock) hydrodynamic properties, tunnel relaxation zone test analysis before and after coal body hardness and gas diffusion initial speed index situation of change before and after slip casting, slip casting, and roadway's sides, the top board amount of shifting near are analyzed, exploration hole situation after being reinforced by the observation of U.S. FS75 type inspection instrument for borehole, to analyze the coal and rock after reinforcing whether possess extinction condition;
7th step: determining to take coal and rock to solidify outburst prevention measures, after whole exposed coal work plane is eliminated completely, adopt fully-mechanized digging machine speedy drivage.
In sum, the enforcement of this inventive method can be summarized as following content:
Namely, on the basis being based upon reliable prediction, inspection, determine that exposed coal work plane front eliminates condition premised on outburst danger, then to the process of length of normal 1.5m ~ 2m rock pillar again taking swash the method construction for delaying, breaking the whole up into parts.Avoid too drastic, too fast construction, to reduce the vibration influence to coal seam, keep the stable of coal body and tunnel, cannot not reach outstandingly, the object of safe coal-openning.Disclose in the process of coal seam, require according to " diligent prediction, short drilling depth, strong supporting, fast driving, strict control is managed, Bolt net and jet " principle carries out exposed coal, carry out prediction without outburst hazard after, another is different from the protrusion-dispelling means of traditional exposed coal to adopt " country rock and coal body grouting and reinforcing outburst prevention measures ", after the coal and rock solidification in exposed coal region, carry out effect inspection again, determining that the coal body in pre-draining borehole and bleeder off hole control range eliminates outburst hazard completely, and strengthen coal and rock supporting, fully-mechanized digging machine driving method is adopted to carry out the tunnelling of exposed coal work plane, while minimizing is to top board and country rock vibrations, play rapid uncovering coal effect.
The above is only the preferred embodiment of the present invention; it should be pointed out that the those of ordinary skill for this method field, without departing from the inventive concept of the premise; can also make some improvements and modifications, these improvements and modifications also should be considered within the scope of protection of the present invention.
Claims (1)
1. quick stone door punching coal and an anti-burst method, is characterized in that: the steps include:
A. take out coal-bed gas in advance in advance, realize the coal seam extinction in exposed coal region, for crossdrift rapid uncovering coal creates necessary condition;
B. adopt the outburst hazard in multi objective prediction coal seam, it comprises the method judging coal seam gas-bearing capacity fast; Improve the accuracy of prediction;
C. coal and rock solidification anti-burst method is adopted, for crossdrift rapid uncovering coal provides safety curtain;
D. fully-mechanized digging machine is in the application of stone door punching coal work plane, achieves the breakthrough of stone door punching coal technique, substantially reduces the time of stone door punching coal;
The method of quick judgement coal seam gas-bearing capacity is:
1. first drill hole sampling, send laboratory to carry out the Industrial Analysis of coal, every physical features that must produce coal;
2. utilizing the prediction before pressure measuring drill hole or exposed coal to hole get coal sample and carry out site desorption, directly measuring desorption of mash gas amount, then by calculating gas loss amount;
3. according in AQ1018-2006 " Emit Quantity Prediction Methods In Coal Mines " appendix C according to the volatile matter of coal defining the span of the residual gas content of coal, get the maximum residual gas content of in-scope, then add loss amount, desorption quantity, draw seam gas content equally fast;
4. from apart from the overall process to exposed coal treating exposed coal layer normal 5m, adopt multi-parameter compound to judge the outburst hazard in coal seam, multi-parameter is for being drilling cuttings desorption of mash gas index K
1or Δ h
2be main, the solid coefficient f of coal, coal seam gas-bearing capacity X
0combine, avoid single index to predict the contingency that Coal Seam Outburst Hazard causes and insensitivity, further ensure accuracy and the reliability of outburst prediction, guarantee the safety of exposed coal.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1155776A1 (en) * | 1983-12-21 | 1985-05-15 | Kochetov Vladimir G | Method of opening-up an outburst-hazardous coal seam with a crosscut |
| SU1613642A1 (en) * | 1988-09-14 | 1990-12-15 | Карагандинское Производственное Объединение По Добыче Угля "Карагандауголь" | Method of exposing sloping outburst-prone coal seams by crosscut |
| CN102242640A (en) * | 2011-07-05 | 2011-11-16 | 河南煤业化工集团研究院有限责任公司 | Rapid outburst elimination method for cross cut coal uncovering in coal mine underground |
| CN102536243A (en) * | 2012-02-28 | 2012-07-04 | 重庆市能源投资集团科技有限责任公司 | Coal seam freezing type cross-drift coal uncovering method |
-
2013
- 2013-05-26 CN CN201310204612.8A patent/CN103306677B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1155776A1 (en) * | 1983-12-21 | 1985-05-15 | Kochetov Vladimir G | Method of opening-up an outburst-hazardous coal seam with a crosscut |
| SU1613642A1 (en) * | 1988-09-14 | 1990-12-15 | Карагандинское Производственное Объединение По Добыче Угля "Карагандауголь" | Method of exposing sloping outburst-prone coal seams by crosscut |
| CN102242640A (en) * | 2011-07-05 | 2011-11-16 | 河南煤业化工集团研究院有限责任公司 | Rapid outburst elimination method for cross cut coal uncovering in coal mine underground |
| CN102536243A (en) * | 2012-02-28 | 2012-07-04 | 重庆市能源投资集团科技有限责任公司 | Coal seam freezing type cross-drift coal uncovering method |
Non-Patent Citations (1)
| Title |
|---|
| 石门快速揭煤防突工艺技术及应用;李青松;《煤矿安全》;20100630(第6期);第20-22页 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109555554A (en) * | 2017-09-25 | 2019-04-02 | 中铁二院工程集团有限责任公司 | Railway Tunnel passes through coal-bed gas outburst hazard prediction construction method |
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