CN103195365A - Rotary drilling rig hard rock stratum step drilling construction process - Google Patents

Abstract

The invention discloses rotary drilling rig hard rock stratum step drilling construction process. The process includes that a, stratum drilling is conducted by using a small-diameter rock tubular drill with the diameter ranging from 800-1000 mm, then slag removing is conducted through a small-diameter sand fishing hopper, and the required pile hole depth h is drilled through repeated and combined drilling; b, according to the diameter of a required pile hole and the diameter of the rock tubular drill drilling for the first time, the number of levels of step drilling is determined, and the diameter difference between adjacent holes is within 400-500mm; and c, a chambering rock tubular drill with drilling diameter one-level larger than that in step a is used for conducting chambering, detritus cut in a chambering process fall into holes drilled by the small-diameter drill, and according to cubic meter of earth and stones and cubic meter of detritus cut during chambering in holes, the chambering depth H of large holes when small hole space is full is calculated. When the chambering depth H is met, chambering is stopped. By means of reasonable grading, a plurality of times of step drilling is conducted, and working efficiency can be improved effectively.

Description

A kind of rotary drilling rig ground consisting of hard rock classification drilling construction technology

Technical field

The present invention relates to a kind of drilling construction technology, specifically is a kind of rotary drilling rig ground consisting of hard rock classification drilling construction technology.

Background technology

Rotary drilling rig uses traditional drilling assembly construction technology mostly when ground consisting of hard rock creeps at present, namely uses tube to creep into earlier, uses the augers fragmentation then, uses the Double bottom plate to drag for slag at last; This kind construction technology, drilling efficiency is lower, and the pick consumption is bigger.The part building site is also arranged at present, adopt classification drilling construction technology to creep into, but there is the hierarchical approaches confusion mostly, can not rationally uses drill bit, do not have the problems such as operating process of standard, cause drill bit unreasonable allocation in early stage, frequently in creeping into change working procedure confusion in drill bit, the construction, effectively drilling time can't guarantee etc. problem to cause the advantage of classification drilling construction technology to bring into play.

Summary of the invention

Problem at above-mentioned prior art exists the invention provides a kind of rotary drilling rig ground consisting of hard rock classification drilling construction technology, by rational classification, carries out the multiple fractionation reaming and creeps into, and can increase work efficiency effectively.

To achieve these goals, the technical solution used in the present invention is: a kind of rotary drilling rig ground consisting of hard rock classification drilling construction technology, and concrete steps are:

A. use bore diameter to creep into capable rock stratum at the small-bore of 800mm-1000mm rock tube earlier and creep into, drag for sand hopper by bore diameter in the small-bore of 800mm-1000mm then and carry out scarfing cinder, cooperate so repeatedly and creep into required stake hole depth h;

B. according to the diameter of the rock tube brill of the diameter in required stake hole and boring first, determine the progression of classification reaming, make diameter difference between the adjacent holes in the 400mm-500mm scope;

C. use bore diameter to creep into capable ream operation than the reaming rock tube of the big one-level of step a, the many rubbles that cut in the reaming process can be fallen in the hole that aperture creeps into, rubble earthwork according to earthwork in the aperture and reaming cutting, calculate macropore reaming depth H when the aperture space is filled up, concrete design formulas is:

$H=\frac{\mathrm{\π}{(d/2)}^{2}h}{\mathrm{\π}({(D/2)}^2-{(d/2)}^2)}$

H in the formula is the reaming degree of depth; D is counter bore diameter; H is the stake hole depth; D is the small-bore diameter; When arriving the reaming depth H, stop reaming;

D. after stopping reaming, use the small-bore to drag for sand hopper and carry out scarfing cinder, and then use the large aperture rock tube among the step c to bore the continuation reaming, scarfing cinder again circulates repeatedly until creeping into required stake hole depth h;

E. use the reaming rock tube of the big one-level of using than previous step of bore diameter to bore and drag for sand hopper repeating step c, d, to hole reaming, scarfing cinder that previous step forms, the diameter, the drilling depth that reach required stake hole until counter bore diameter reach required stake hole depth h;

F. equal two-stage as the progression that needs the classification reaming, then need not step e; As the progression of need classification reaming greater than three grades, corresponding repeating step e then.

Compared with prior art, the method that the present invention adopts classification to creep into guarantees the smoothness of working procedure, efficient operation, improves drilling efficiency, efficiency of construction can be improved 1.5 times; When creeping into, reaming use the rock tube to bore, when having avoided the reaming of use Double bottom plate to creep into, heel teeth is stressed, the center is unsettled, the problem of drill bit rapid wear, and use the reaming of rock tube brill to creep into than using the reaming of Double bottom plate to creep into efficiency of construction and improved 2 times, rig is when creeping in addition, more little more being easy in aperture crept into, the advantage of this technology performance rig in slim-hole drilling, and by reasonable classification number of times, thereby rationally use the rock tube to bore counter bore diameter, rock can be broken easily when making the rock tube bore reaming, and fall among the aperture, use is dragged for sand hopper and is picked up, thereby gives full play to the rig advantage, avoid the repetition fragmentation, improved drilling efficiency.

Description of drawings

Fig. 1 is workflow diagram of the present invention.

The specific embodiment

The invention will be further described below in conjunction with accompanying drawing.

Embodiment 1: required stake hole is Ф 1500mm, creeps into rock stratum degree of depth 15m; Use secondary hierarchical approaches (as shown in Figure 1);

A: use Ф 1000mm rock tube to creep into earlier, take tube to drill through the preferential operator scheme of core, core is unsuccessful can to cooperate Ф 1000mm to drag for the sand hopper scarfing cinder if get, and creeps into the 15m place;

B: use Ф 1500mm rock tube to creep into capable reaming, when creeping into 6.7m by design formulas in the rock stratum, the rubble that gets off is cut in reaming, Ф 1000mm aperture space can be filled up;

C: after Ф 1000mm aperture space is filled, use Ф 1000mm to drag for sand hopper and carry out scarfing cinder, and then use Ф 1500mm rock tube to bore and continue reaming, when creeping into 3.7m again, Ф 1000mm aperture space fills up again, re-use Ф 1000mm and drag for sand hopper and carry out scarfing cinder this moment, and so repeatable operation is crept into projected depth 15m.

Embodiment 2: required stake bore dia is Ф 1800mm, creeps into rock stratum degree of depth 20m, by using three grades of classification modes;

A: use Ф 1000mm rock tube to creep into earlier, take tube to drill through the preferential operator scheme of core, core is unsuccessful can to cooperate Ф 1000mm to drag for the sand hopper scarfing cinder if get, and creeping into the degree of depth is the 20m place;

B: use Ф 1400mm rock tube to creep into capable reaming, when creeping into 10.2m in the rock stratum, the rubble that gets off is cut in reaming, Ф 1000mm aperture space can be filled up;

C: after little Ф 1000mm aperture space is filled, use Ф 1000mm to drag for sand hopper and carry out scarfing cinder, and then use Ф 1400mm rock tube to bore and continue reaming, when creeping into 5.0m again, Ф 1000mm fills up in the aperture again, re-use Ф 1000mm and drag for sand hopper and carry out scarfing cinder this moment, and so repeatable operation is crept into projected depth 20m;

D: use Ф 1800mm rock tube to creep into capable reaming, when creeping into 12.0m in the rock stratum, the rubble that gets off is cut in reaming, Ф 1400mm aperture space can be filled up.

E: after little Ф 1400mm aperture space is filled, use Ф 1400mm to drag for sand hopper and carry out scarfing cinder, and then use Ф 1800mm rock tube to bore and continue reaming, when creeping into 4.8m again, Ф 1400mm fills up in the aperture again, re-use Ф 1400mm and drag for sand hopper and carry out scarfing cinder this moment, and so repeatable operation is crept into projected depth 20m.

Be the rock stratum that the saturated uniaxial compressive strength in stratum surpasses 30Mpa in the rock stratum, adopt grading technology of the present invention to compare with traditional construction technology in this rock stratum, can increase work efficiency significantly.

Claims (1)

1. rotary drilling rig ground consisting of hard rock classification drilling construction technology is characterized in that concrete steps are:

A. use bore diameter to creep into capable rock stratum at the small-bore of 800mm-1000mm rock tube earlier and creep into, drag for sand hopper by bore diameter in the small-bore of 800mm-1000mm then and carry out scarfing cinder, cooperate so repeatedly and creep into required stake hole depth h;

B. according to the diameter of the rock tube brill of the diameter in required stake hole and boring first, determine the progression of classification reaming, make diameter difference between the adjacent holes in the 400mm-500mm scope;

C. use bore diameter to creep into capable ream operation than the reaming rock tube of the big one-level of step a, the many rubbles that cut in the reaming process can be fallen in the hole that aperture creeps into, rubble earthwork according to earthwork in the aperture and reaming cutting, calculate macropore reaming depth H when the aperture space is filled up, concrete design formulas is:

$H=\frac{\mathrm{\π}{(d/2)}^{2}h}{\mathrm{\π}({(D/2)}^2-{(d/2)}^2)}$

H in the formula is the reaming degree of depth; D is counter bore diameter; H is the stake hole depth; D is the small-bore diameter; When arriving the reaming depth H, stop reaming;

D. after stopping reaming, use the small-bore to drag for sand hopper and carry out scarfing cinder, and then use the large aperture rock tube among the step c to bore the continuation reaming, scarfing cinder again circulates repeatedly until creeping into required degree of depth h;

E. use the reaming rock tube of the big one-level of using than previous step of bore diameter to bore and drag for sand hopper repeating step c, d, to hole reaming, scarfing cinder that previous step forms, the diameter, the drilling depth that reach required stake hole until counter bore diameter reach required stake hole depth h;

F. equal two-stage as the progression that needs the classification reaming, then need not step e; As the progression of need classification reaming greater than three grades, corresponding repeating step e then.

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