33results about How to "Improve drilling utilization" patented technology

The invention discloses a four-period-five-purpose hole-drilling high-efficiency gas extracting process, comprising the steps of: drilling a measure hole from a rock stratum tunnel wall of a coal seam top plate rock stratum tunnel to one side of the rock stratum tunnel and drilling a extracting hole from the rock stratum tunnel wall of the coal seam base plate rock stratum tunnel to a coal seam working face; performing shock blasting and/or hydrofracture to the measure hole for increasing the permeability of the coal seam, wherein the measure hole is a rock hole in the top plate or base plate rock stratum of the coal seam and positioned over or under the coal seam working face; sealing the measure hole and the extracting hole for extracting gas, and then tunneling the tunnel of the coal seam; continuously extracting the gas in the coal seam through the measure hole and/or the extracting hole when before and in stope. According to the four-period-five-purpose hole-drilling high-efficiency gas extracting process, the high-efficiency gas extraction in periods of tunneling the coal seam tunnel, and before, in and after stoping on the working face can be achieved. And simultaneously, the four-period-five-purpose hole-drilling high-efficiency gas extracting process can shield the tunneling of double coal seam tunnel of the working face.

The invention discloses a deep coal bed gas and heat co-extraction method. The method comprises the steps that 1, a first vertical drilling well is constructed, a heat-preserving casing pipe is adopted for carrying out gas sealing and heat isolating protection for a well hole; 2, construction of a layering horizontal well is carried out according to the thickness of a coal bed, the layering numberK is determined according to the coal bed real thickness M and the gas drainage radius R, and K is equal to M/2R; 3, a second vertical drilling well is constructed; 4, circumferential dispersing holes of the horizontal well are constructed, and then first extraction of gas is carried out; 5, hydraulic fracturing is carried out on all the drilled holes, a three-dimensional fracture mesh is formed,and then second extraction of the gas is carried out; 6, the first vertical drilling well serves as a water injecting well, the second vertical drilling well serves as a steam output well, the wateris injected into the deep coal bed, the principle of heat transfer is utilized for transferring geothermal energy into the water steam, and the water steam is extracted and utilized. According to themethod, gas extraction and geothermal energy exploitation can be carried out for the deep coal bed which is 1500-3000 meters, the geothermal extraction efficiency is improved, energy is saved, emission is reduced, and the geological environment problems of water and soil pollution, thermal pollution and the like are prevented.

Provided is a coupling fracturing method for a hard coal bed roof. A drilling machine is utilized for drilling fracturing drill holes inside the hard roof till the design position, specifically, each static fracturing guide drill hole is formed between every two pulse hydraulic fracture drill holes so as to form a fracturing system; the fracture drill holes are connected to a pulse water injection pump through an isometric flow distributor with adjustable frequency, and the static fracturing drill holes are filled with static crushing agent slurry; under the action of expansion force of the static crushing agent slurry, initial cracks formed around the drill holes are monitored, released heat irradiates continuously towards the portions around the drill holes, a similarly elliptical temperature field is generated, and the elasticity modulus of a rock stratum is reduced; and under the action of hydraulic pressures of different frequencies, a fracture zone, a fatigue zone and an original stress zone are formed in the positions, around the fracture drill holes, of the rock stratum, when pressure water flows to the rock stratum bearing heat conduction along the cracks, the water and heat effect weakens the strength of the rock stratum, and the through time for crack zones among the drill holes is shortened. The method can sufficiently improve the utilization rate of the drill holes, operation is easy, and construction is safe and reliable.

A hole-sealing, hydraulic-fracturing and gas-extraction integrated construction device comprises a first bag, a second bag, a grouting pipe, a hydraulic fracturing pipe, a gas extraction pipe and a perforated pipe. The first bag is arranged in a drilled hole and located near a hole opening, the second bag is arranged in the drilled hole and located near the hole bottom, the grouting pipe and the gas extraction pipe both sequentially penetrate through the first bag and the second bag from left to right and then extend into the hole bottom, and the left end of the perforated pipe is coaxially and fixedly connected with the right end of the gas extraction pipe. The outer diameter of the hydraulic fracturing pipe is smaller than the inner diameter of the gas extraction pipe, the hydraulic fracturing pipe is coaxially arranged in the gas extraction pipe and the perforated pipe, and the right end of the hydraulic fracturing pipe rightwards extends out of the right end of the perforated pipe. The invention further discloses a hole-sealing, hydraulic-fracturing and gas-extraction integrated construction method, that is, after a hydraulic fracturing procedure, the hole continues to be used for gas extraction; and a novel layer-penetrating fracturing-gas extraction integrated hole drilling and sealing process is provided, the good versatility of the drilled hole is guaranteed, the number of drilled holes is reduced, and the construction cost is lowered accordingly.

The invention provides a coal engineering hole directional drilling method, which mainly solves the problems of low drilling precision and complex procedure of the conventional directional drilling method. The directional drilling method is characterized by comprising the following steps of: 1, designing a drilling trace: designing the drilling trace and drilling parameters according to the requirement of engineering drilling; 2, determining special equipment, machines and devices which are required by the engineering, and combining the drilling equipment according to the requirements of all drilling stages; 3, constructing according to the trace and the parameters which are designed in the step 1, measuring the finished drilling trace by using an inclinometer after one stage is finished, analyzing whether data is the same as the designed trace, and expecting the next trace tendency; and 4, performing error correction design if error correction is needed to be performed in the step 3, repeating the content in the step 2, and cycling until the drilling is finished; and if error correction is not needed in the step 3, continuing to drill the next hole section until the drilling is finished. The coal engineering hole directional drilling method has the characteristics of high drilling precision, simple procedure, smooth drilled holes and contribution to the next work of drilling.

The invention relates to a detection system and a method for monitoring fracture development of a coal pillar-free gob-side entry retaining floor. The method comprises the following steps of chiseling a floor drilling field at one side of the coal pillar-free gob-side entry retaining, drilling in a floor rock layer according to different angles, gradually butting transparent hollow pipe sections by a butting sealing system, and sending into each drilling hole; grouting and anchoring a gap between each drilling hole and the corresponding transparent hollow pipe, enabling a detection positioning assembly to record the fracture of the drilling surrounding rock according to different scales of a measuring tape, performing monitoring tasks on evolution of floor mining failure rule for multiple times in different mining phases until the data is stable, and then finishing the observation. The method has the advantages that the floor small-angle drilling hole, the floor medium-angle drilling hole, and the floor large-angle drilling hole extend from the drilling field to the floor of a to-be-mined coal layer and are distributed in parallel in a stereo way; by observing the fracture condition of adjacent drilling holes in the same time and the fracture condition of the same drilling hole in different coal mining phases, the development state of the plastic failure area of the floor and the development state of the failure area of the floor after the coal bed is mined are determined, so as to provide reliable data reference for safety construction.

The invention discloses a coal face fissure zone gas extraction method. According to the principle of the coal face fissure zone gas extraction method, before working face stoping, a drill hole arrangement method is determined through goaf overlying strata movement and gas seepage research, staggered high and low fissure zone directional long drill holes along the working face trend are arranged in a drilling field in a working face air return gate road, a main hole section of the high-position drill hole extends within the range of 30 m above a goaf formed after stoping of the working face, the low-position drill hole sinks properly at the position of the working face, a low negative pressure balanced extraction mode is adopted for the low-position drill hole, a high negative pressure balanced extraction mode is adopted for the high-position drill hole, and gas in a fissure zone and the goaf after stoping of the working face is extracted. According to the method, gas in the coal facefissure zone can be fully extracted, the gas concentration in the upper corner and the return air flow of the stoping face is reduced, meanwhile, the effect of treating goaf gas is achieved, gas treatment of the working face is achieved, and safe stoping of the coal face is guaranteed.

The invention provides a rectangular drilling stress monitoring device and method. The monitoring device comprises a rectangular drilling bit, a drilling pipe and a rectangular drilling stress monitor. The rectangular drilling bit includes an outer frame, and the outer frame is internally provided with forward cutters, diagonal cutters and a center guide cutter. The rectangular drilling stress monitor includes an upper cover, a lower cover, stress sensors and digital displayers. The monitoring method includes the steps of forming guide drilling holes in advance, forming rectangular drilling holes and installing the rectangular drilling stress monitor for monitoring. The monitoring device can effectively overcome the shortcomings that the test direction of traditional drilling stress gaugesis unclear and the test value is inaccurate, can accurately measure surrounding rock stress values at any angle in the vertical direction and the horizontal direction and can provide more reliable data for on-site mine pressure disaster prediction and forecast. The device and the implementation method provide a more reliable guarantee for monitoring of surrounding rock stress in coal mines in China.

The invention discloses a drill hole anchoring structure for monitoring floor surrounding rock fractures and a construction method thereof. Transparent hollow pipes are connected in a butt joint mode section by section through butt joint sealing assemblies and a bottom sealing assembly and then fed into a drill hole; after a gap between the drill hole and the transparent hollow pipes is subjected to grouting anchoring, drill hole surrounding rock fractures at different scale positions on a measuring ruler are recorded through a detecting and positioning assembly. The rock stratum development condition in the drill hole is directly read, and the drill hole anchoring structure has the advantages of being reasonable in integral structural design, easy to construct, safe, stable, low in drilling failure rate, capable of providing clear images, capable of meeting the requirement for repeated observation and the like; the fracture positions and forms on a drill hole grouting body are directly read through the transparent hollow pipes and directly reflect the positions of floor surrounding rock fractures in the drill hole, and compared with traditional distance position data acquired indirectly, errors are greatly reduced; the drill hole in the same position is used for observing the progress of fracture development at different stages, data is real and reliable, and the position and development condition of rock stratum change can be rapidly and precisely obtained.

The invention belongs to the field of coal mine safety, and relates to a coal roadway advanced area pre-extraction method based on directional extraction drilling cross-roadway arrangement. The coal roadway advanced area pre-extraction method based on directional extraction drilling cross-roadway arrangement utilizes a directional drilling construction technology to realize the regional pre-extraction of coal seam gas in a coal roadway excavation area in advance, does not destroy the drilling extraction function during roadway excavation, can achieve the purposes of continuous and efficient extraction and multiple purposes of one hole, can effectively alleviate the situation of tight mine 'extraction and excavation' and improve the utilization rate of extraction drilling, has significant economic benefits, and is particularly suitable for single coal seam mining or high gas and outburst mines without special gas extraction roadways.

The invention discloses a secondary hole sealing method for an underground coal mine gas drainage drill hole. The secondary hole sealing method comprises the following steps that (1) a bag type grouting hole sealing device and a two-blocking one-injecting hole sealing process are adopted for implementing first-time hole sealing and continuous drainage; (2) during gas drainage, a low-concentration gas drainage drill hole is selected, and a connected gas drainage pipeline is disconnected; (3) a sealing steel pipe is connected with a compressed air self-rotating drill bit and then inserted into a first-time hole sealing pipe, a high-pressure air supply pipeline is connected, and coal slag in the hole sealing pipe and the drill hole is cleaned through the compressed air self-rotating drill bit and high-pressure air blowing; (4) the sealing steel pipe is withdrawn, and a second-time hole sealing device is plugged into the first-time hole sealing pipe to a designed position; (5) grouting is conducted on the second-time hole sealing device for implementing secondary hole sealing; and (6) a hole sealing pipe of the second-time hole sealing device is connected into the gas drainage pipeline for gas drainage. According to the secondary hole sealing method for the underground coal mine gas drainage drill hole, the application engineering cost is low, the process is relatively simple, the drainage efficiency is fully improved, the drainage time is shortened, and gas disasters are eliminated to the maximum extent.

The invention discloses a space and time coordination control weakening method for a hard coal seam roof. The space and time coordination control weakening method comprises the steps that firstly, a plurality of advanced weakening fracturing drilling groups are drilled in sequence in the advance direction of the coal seam working face on the roof of a return air roadway, wherein each advanced weakening fracturing drilling group internally comprises a first row of fracturing drill holes, a second row of fracturing drill holes and a third row of fracturing drill holes which are arranged in sequence in the advance direction of the coal seam working face, and all the three rows of fracturing drill holes are inclined at different angles towards the direction of a goaf; and when the coal seam working face advances to the position of the advanced weakening fracturing drilling groups, the three rows of fracturing drill holes are filled with static crushing agent cartridges in sequence to realize gradual fracturing weakening of the roof rock layer. According to the method, the best effect of the cartridges is achieved by using the free surface to create a free face or a weakening layer, ''gradual weakening + overall fracture '' is achieved, and the space and time coordination fracturing of the drill holes with different tilt angles of the roof is realized, so that the roof caving efficiency is enhanced. The space and time coordination control weakening method for the hard coal seam roof is simple in structure, and the fracturing effect is good.

The invention discloses a ground-underground combined exploration and treatment method for a mine geological anomalous body. The method comprises the following steps of 1, exploration, wherein the position of the geological anomalous body is determined, that the geological anomalous body is communicated with gray water is determined, and the water burst risk exists, wherein 1.1 mine underground exploration is conducted, 1.2 three-dimensional seismic exploration is conducted, an anomalous area is delineated, and 1.3 ground exploration is conducted mainly by drilling a hole, and a three-opening well body structure is adopted for the drilled hole; and 2, treatment, wherein 2.1 ground treatment is conducted, and 2.2 underground treatment is conducted. According to the ground-underground combined exploration and treatment method for the mine geological anomalous body, directional drilling of the ground and directional long drilling of an underground bottom plate along the layer are combined according to engineering practice, exploration and treatment of the mine geological anomalous body are conducted, the effects that the exploration and treatment time is advanced, the exploration and treatment space range is large, the exploration accuracy is high, the overall elimination effect of water damage hidden danger is good, a water guide fracture channel is effectively blocked, and the treatment effect is obvious are achieved.

The invention discloses a complex roof rock stratum high-position directional long drill hole construction device. The complex roof rock stratum high-position directional long drill hole construction device is characterized by comprising a water feeder, a drill rod, a first steering stub, a first measuring exploring tube, an upper non-magnetic drill rod, a second measuring exploring tube, a lower non-magnetic drill rod, a second steering stub and a drill bit, wherein one end of the water feeder is connected to the drill rod; the drill rod is connected to the first measuring exploring tube through the first steering stub; the first measuring exploring tube is connected to the upper non-magnetic drill rod; the upper non-magnetic drill rod is connected to the lower non-magnetic drill rod through the second measuring exploring tube; the lower non-magnetic drill rod is connected to the second steering stub; and the drill bit is arranged at one end of the second steering stub; and the other end of the water feeder is provided with a communication cable.

The invention discloses a ground double-hole combined water inrush prevention method for overlying strata movement monitoring and bed separation water drainage. The ground double-hole combined water inrush prevention method is suitable for treatment of overlying separation flood after mining of a water-rich stratum mine and comprises the steps that a rock stratum movement monitoring drill hole and a bed separation water drainage drill hole which are adjacent to each other are constructed in the middle of a working face along the trend corresponding to the earth surface, the rock stratum movement monitoring drill hole is formed to monitor internal movement information of an overlying rock stratum in the working face mining process, and the bed separation development condition is mainly mastered; and the bed separation water drainage drill hole is used for drilling and penetrating holes based on the bed separation generation time fed back by rock stratum movement monitoring in the arranged rock stratum movement monitoring drill hole, drilling and hole penetration are carried out, bed separation water is drained in a staged and controlled mode, and water inrush of the working face is prevented. The drilling depth, drainage and hole penetration of the bed separation water drainage drill hole are guided by monitoring the change of the measuring points arranged in the upper rock stratum and the lower rock stratum of the bottom interface of an aquifer. The utilization rate of the bed separation water drainage drill holes is effectively improved through combination of the mobile monitoring drill holes in the rock stratum and the bed separation water drainage drill holes.