CN105486431B - A kind of recoverable drilling hole stress monitoring device and monitoring method - Google Patents

A kind of recoverable drilling hole stress monitoring device and monitoring method Download PDF

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Publication number
CN105486431B
CN105486431B CN201511023996.9A CN201511023996A CN105486431B CN 105486431 B CN105486431 B CN 105486431B CN 201511023996 A CN201511023996 A CN 201511023996A CN 105486431 B CN105486431 B CN 105486431B
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drilling
hydraulic
hydraulic pressure
feeler lever
hydraulic jack
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CN105486431A (en
Inventor
田成林
谭云亮
宁建国
刘学生
李广波
顾清恒
史新帅
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Shandong University of Science and Technology
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Shandong University of Science and Technology
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00Measuring force or stress, in general

Abstract

The invention belongs to mining pressure monitoring field, and in particular to a kind of recoverable drilling hole stress monitoring device and monitoring method.Induction installation, outside Fuel Tanking Unit and external memory that device includes drilling apparatus, is connected with its input;Below monitoring method step:This monitoring device is assembled, feeler lever is sent into and specified at drilling depth by mining geological drilling rig;Open it is all enter oil control valve, start in electric oil pump station, hydraulic oil injection hydraulic jack and hydraulic pressure capsule, hydraulic jack drives the hydraulic pressure capsule at the top of it to be ejected from oval small opening, closes into oil control valve;When pressure reaches setting value, electric oil pump station is closed, into drilling hole stress monitoring state, and digital display stress sheet numerical value change is recorded;It is to be monitored to terminate, open it is all go out oil control valve, hydraulic pressure capsule is retracted into feeler lever with the retraction of hydraulic jack, sets back;Feeler lever is removed from drilling, completes to reclaim.

Description

A kind of recoverable drilling hole stress monitoring device and monitoring method
Technical field
The invention belongs to mining pressure monitoring field, and in particular to a kind of recoverable drilling hole stress monitoring device and Monitoring method.
Background technology
Mine down-hole exploitation will force surrouding rock stress to be changed into Two dimensional Distribution from original space three-dimensional distribution, that is, cause country rock Stress is redistributed.Practice have shown that, scientific knowledge simultaneously grasps stress distribution and coverage caused by exploitation, for bump Prediction and preventing and treating have most important effect.The deep wall rock stress variation caused by exploitation is generally come by borehole stressmeter Reflection, therefore, the development of borehole stressmeter has practical significance for the monitoring of deep mining rock blast hazard regional stress.
Patent of invention " borehole stressmeter of a hole multimetering " (application number:200710120070.0) it is by hydraulic jack It is connected with pressure sensor, multiple borehole stressmeters is sequentially placed the precalculated position in installation guide rail, and it is total defeated with same Oil pipe is connected in parallel the check valve of all borehole stressmeters, is sent into together with guide rail is installed in drilling, it is ensured that sensitive plunger All the time perpendicular to horizontal plane.Reach to extract out behind precalculated position and guide rail is installed, oiling is raised up to plunger into each oil pressure cylinder Good rear stopping oiling being contacted with drilling roof, borehole stressmeter starts normal work, realized simultaneously in the interior multiple spot of a drilling Measurement position is installed and tested.The inventive structure realizes a hole multimetering, reduces workload, saves human and material resources. But the structure is connected as by rigid hydraulic jack with pressure sensor, because hydraulic jack rigidity is mismatched with drilling country rock, It is not fairly obvious plus pressure change sometimes, therefore it is difficult to ensure that promptly and accurately monitoring, monitoring effect accuracy needs into one Step demonstrate,prove, though in addition, the device can the hole multimetering of solid line one, can not recycling, in large area in use, cost Input is higher.
Patent of invention " flexible mine compression monitoring pressure cushion, monitoring device and its monitoring method " (application number: 201110036482.2) traditional rigid pressure is replaced to rest the head on flexible pressure cushion, with hole wall after this pliable pressure pillow pressurising It is in close contact, when monitoring coal and rock compression, as long as rock mass somewhat has pressure, so that it may capture, solves read untrue And loss situation, and the insensitive problem of pressure cushion.The inventive structure timely to pressure change can be caught, but by drilling hole stress Labyrinth and the influence of site operation complexity are counted, is typically that a borehole stressmeter is installed in a drilling at present, it is impossible to real More porous monitoring, though in addition, the device can catch the pressure of change in time, can not recycling, in large area In use, cost input is higher.
The content of the invention
Insensitive for borehole stressmeter of the prior art monitoring, construction is complicated, cost is high, efficiency is low and can not return The problems such as receipts, it is proposed that a kind of recoverable drilling hole stress monitoring device and monitoring method.
The present invention is adopted the following technical scheme that:A kind of recoverable drilling hole stress monitoring device, including drilling apparatus and its The connected induction installation of input, outside Fuel Tanking Unit and external memory;
The drilling apparatus includes mining geological drilling rig, the drilling rod being connected with its output end and is connected with drilling rod internal thread Some feeler levers that mutually splice;It is equidistant on the feeler lever to be provided with 3-4 oval small opening;
The induction installation is included in the oval hydraulic pressure capsule set in oval small opening;On the inwall of the feeler lever side It is provided with neck, neck and hydraulic jack is installed, hydraulic jack top surface is provided with the card convex for preventing departing from feeler lever, The fixed block corresponding with card convex is provided with feeler lever neck;The top of hydraulic jack and the thread complete set outside hydraulic pressure capsule Mutually weldering connects;Thread complete set is internally provided with the pressure sensor of sensing hydraulic pressure capsule pressure;
The outside Fuel Tanking Unit includes electric oil pump station and outside oil conservator;Described electric oil pump station passes through oil inlet pipe Road is connected with hydraulic jack and hydraulic pressure capsule respectively;The hydraulic jack and hydraulic pressure capsule respectively by go out oil return line with it is outer Portion's oil conservator is connected;Be provided with described in-line into oil control valve, go out on oil return line to be provided with unidirectionally go out oil control valve;
The external memory is the digital display stress sheet with store-memory function, the input of digital display stress sheet and sense The drilling rod in device, feeler lever is answered to be connected with the DOL Data Output Line of pressure sensor inside.
Preferred scheme is as follows:
The adjacent spacing of small opening is 50-55cm.Monitoring Data is facilitated to change.
Small opening position is provided with the anticreep hoop for preventing that hydraulic pressure capsule from slipping.High-strength rubber leather bag is filled as pressure sensing Put, the pressure of change can be caught in time, sensitivity is high, and monitoring effect is good.
A kind of monitoring method of recoverable drilling hole stress monitoring device, step is as follows:
(1) this monitoring device is assembled, feeler lever is sent into and specified at drilling depth by mining geological drilling rig;
(2) open it is all enter oil control valve, start electric oil pump station, hydraulic oil is injected by hydraulic jack in-line Hydraulic jack, hydraulic jack drives the hydraulic pressure capsule at the top of it to be ejected from oval small opening;Meanwhile, into hydraulic pressure capsule Inject after hydraulic oil, by pressure conduction to pressure sensor, and be output on digital display stress sheet and shown by DOL Data Output Line Out;After hydraulic pressure capsule is from the removal of oval small opening, closes on hydraulic jack oil inlet pipe and enter oil control valve;Observe simultaneously The numerical value change of outside digital display stress sheet, when pressure sensor, which is conducted through next pressure, reaches setting value, closes electric oil pump Stand, and simultaneously close off and enter oil control valve on hydraulic pressure capsule in-line, into drilling hole stress monitoring state, and record digital display should Power table numerical value change;
(3) it is to be monitored terminate, open it is all go out oil control valve, then the hydraulic oil in hydraulic pressure capsule and hydraulic jack is through going out Oil return line flows into outside oil conservator, and hydraulic pressure capsule is retracted into feeler lever with the retraction of hydraulic jack, set back;
(4) mining geological drilling rig is controlled, feeler lever is removed from drilling, completes to reclaim.
Preferred scheme is as follows:
P in step (2)0For 2-3MPa.
After monitoring terminates, it can be shown from digital display stress sheet according to coal-face propulsion and record drilling hole stress Situation of change, using working face away from hole spacing is monitored as abscissa, drilling hole stress reading is ordinate, draws the relationship of the two bent The situation of change of line, further analysis and research drilling hole stress.
The present invention has the advantages that:Many feeler lever tandem compounds can be used according to detection requirement, realize a hole Multimetering, reduces drilling hole amount, reduces labor strength, improves detection efficient.The present invention is applicable not only to depth Portion's pit mining drilling hole stress monitoring, it is same effective for the monitoring of shallow mining drilling hole stress, with recyclable reuse, prison The advantages of surveying simple sensitivity height, installation operation, efficiency high, is easy to large-scale promotion to use.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs Some bright embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is device overall structure diagram in the present invention;
Fig. 2 is small opening enlarged diagram in apparatus of the present invention;
Fig. 3 is hydraulic jack and feeler lever sectional arrangement drawing in apparatus of the present invention;
Fig. 4 is in-line and fuel-displaced circuit diagram in the inventive method;
Fig. 5 is to contact schematic diagram with the wall of a borehole after the pressurization of hydraulic pressure capsule in the present invention;
Fig. 6 is 1# survey station distance-stress diagrams in the embodiment of the present invention 1;
Fig. 7 is 2# survey station distance-stress diagrams in the embodiment of the present invention 1;
Fig. 8 is 3# survey station distance-stress diagrams in the embodiment of the present invention 1.
In figure, 1- is mining geological drilling rig, 2- drilling rods, 3- electric oil pumps station, 4- feeler levers, 5- small openings, 6- hydraulic pressure capsules, 7- prevents Oil conservator, 11- thread complete sets, 12- pressure sensors, 13- data outputs outside de- hoop, 8- hydraulic jacks, 9- card convexs, 10- Line, 14- digital display stress sheets, 15- hydraulic pressure capsule petroleum pipelines, 16- hydraulic jack petroleum pipelines, 17- fixed blocks, 201,202- Enter oil control valve, 203,204- go out oil control valve.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings, but the invention is not limited in specific embodiment.
Embodiment 1:
The geological conditions at place to be monitored:The current minable coal seam of certain ore deposit is 7#, 8#, 11-1#, 12-2# coal seam.Concrete condition is such as Under:
(1) 7# coal seams are located in the middle part of coal measures, are directly Sandy Silt at most, and base object model is locally contained based on powder, packsand There is medium coarse sand rock;
(2) 8# coal seams are away from 7# coal seams spacing 15m or so, and its Lao Ding Hebei District is made up of siltstone and medium coarse sand rock, westwards Fade to powder, fine sand alternating layers;
(3) 11# coals are located at coal measures bottom, away from 8# coal seams spacing 35m or so.Coal seam layer position is stable, and structure is simpler.Top plate Based on packsand, dense structure, strong bonding, compression strength are higher, and coal measure strata is Jurassic system Datong District group, and coal seam has ash Divide low, the characteristics of volatile matter is high, ature of coal is single, is good high-quality thermal coal;The long 160m in 11#8709 working faces face, coal is thick 2.8m or so, working face, which is used, moves towards the whole caving method fully-mechanized minings of longwell retrusive.
For 11# working face strata behaviors rules under research mutil-coal seam mining, implemented using the present invention.
Survey station is arranged first, the first survey station is being arranged in front of coal-face at 50m tracks lane, at the first survey station 30m The second survey station is arranged, away from the 3rd survey station is arranged at the second survey station 30m, each survey station is drilled towards rib, installs recoverable Drilling hole stress monitoring device is simultaneously monitored using the monitoring method provided in the present invention.
A kind of recoverable drilling hole stress monitoring device, including drilling apparatus, the induction installation, outer that is connected with its input Portion's Fuel Tanking Unit and external memory;
The drilling apparatus include mining geological drilling rig 1, the drilling rod 2 that is connected with its output end and with the internal thread phase of drilling rod 2 The feeler lever 4 that 3 even are mutually spliced;It is equidistant on the feeler lever 4 to be provided with 4 oval small openings 5;
The induction installation is included in the oval hydraulic pressure capsule 6 set in oval small opening 5;In the side of feeler lever 4 It is provided with wall in neck, neck and hydraulic jack 8 is installed, the side surface of hydraulic jack 8, which is provided with, prevents from departing from feeler lever Card convex 9, be provided with the fixed block 17 corresponding with card convex 9 in feeler lever neck;The top of hydraulic jack 8 and hydraulic pressure capsule 6 The outside thread complete set 11 mutually company of weldering;Thread complete set 11 is internally provided with the pressure sensor 12 of the pressure of sensing hydraulic pressure capsule 6;
The outside Fuel Tanking Unit includes electric oil pump station 3 and outside oil conservator 10;Described electric oil pump station 3 is by entering Oil pipe line is connected with hydraulic jack 8 and hydraulic pressure capsule 6 respectively;The hydraulic jack 8 and hydraulic pressure capsule 6 are respectively by fuel-displaced Loop is connected with outside oil conservator 10;It is provided with described in-line into oil control valve, goes out on oil return line to be provided with unidirectional Go out oil control valve;
The external memory is the digital display stress sheet 14 with store-memory function, the input of digital display stress sheet 14 It is connected with the DOL Data Output Line 13 inside the drilling rod 2 in induction installation, feeler lever 4 and pressure sensor 12.
The adjacent spacing of small opening 5 is 55cm.Monitoring Data is facilitated to change.
The position of small opening 5 is provided with the anticreep hoop 7 for preventing that hydraulic pressure capsule 6 from slipping.High-strength rubber leather bag is used as pressure sensing Device, the pressure of change can be caught in time, and sensitivity is high, and monitoring effect is good.
A kind of monitoring method of recoverable drilling hole stress monitoring device, step is as follows:
(1) this monitoring device is assembled, mining geological drilling rig 1 sends into feeler lever 4 at specified drilling depth;
(2) open it is all enter oil control valve 202 and 203, start electric oil pump station 3, hydraulic oil passes through hydraulic jack jacking Oil pipe line 15 injects hydraulic jack 8, and hydraulic jack 8 drives the hydraulic pressure capsule 6 at the top of it to be ejected from oval small opening;Together When, injected into hydraulic pressure capsule 6 after hydraulic oil, by pressure conduction to pressure sensor 12, and it is defeated by DOL Data Output Line 13 Go out onto digital display stress sheet 14 and show;After hydraulic pressure capsule 6 is from the removal of oval small opening, hydraulic jack oil inlet pipe is closed Enter oil control valve 202 on 16;The numerical value change of outside digital display stress sheet 14 is observed simultaneously, is come when pressure sensor 12 is conducted through Pressure when reaching setting value 3MPa, close electric oil pump station 3, and simultaneously close off the oil-feed control on hydraulic pressure capsule in-line 15 Valve 203 processed, into drilling hole stress monitoring state, and records the numerical value change of digital display stress sheet 14;
(3) it is to be monitored to terminate, oil control valve 201 and 204 is opened out, then the hydraulic pressure in hydraulic pressure capsule 6 and hydraulic jack 8 Go out oil return line of the oil through hydraulic pressure capsule petroleum pipeline 15 and hydraulic jack petroleum pipeline 16 flows into outside oil conservator 10, hydraulic pressure glue Capsule 6 is retracted into feeler lever 4 with the retraction of hydraulic jack 8, is set back;
(4) mining geological drilling rig 1 is controlled, feeler lever 4 is removed from drilling, completes to reclaim.
After monitoring terminates, according to the propulsion of coal-face, shown from digital display stress sheet 14 and record drilling hole stress Situation of change, using working face away from hole spacing is monitored as abscissa, drilling hole stress reading is ordinate, draws the relationship of the two curve The situation of change of (as shown in accompanying drawing 6,7,8) further analysis and research drilling hole stress.As seen from the figure:
(1) working face away from survey station more than 45m when, the stress kept stable in coal column;
(2) when being less than 45m away from survey station, with the propulsion of working face, the stress in coal column gradually increases;
(3) when away from survey station 8-23m, the stress in coal column reaches maximum, and then, the stress in coal column is gradually reduced.
(4) it follows that 8709 ahead work faces supporting pressure influence scope is 0-45m in front of working face, peak value is located at In front of working face in the range of 8-23m.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck The technical staff in domain the present invention essential scope in made change, retrofit, add or stop to change, should also belong to the present invention Protection domain.

Claims (6)

1. a kind of recoverable drilling hole stress monitoring device, it is characterised in that the sense being connected including drilling apparatus, with its input Answer device, outside Fuel Tanking Unit and external memory;
The drilling apparatus include mining geological drilling rig, the drilling rod being connected with its output end and be connected with drilling rod internal thread it is some The feeler lever that root mutually splices;It is equidistant on the feeler lever to be provided with 3-4 oval small opening;
The induction installation is included in the oval hydraulic pressure capsule set in oval small opening;Set on the inwall of the feeler lever side Have and hydraulic jack is installed in neck, neck, hydraulic jack top surface is provided with the card convex for preventing departing from feeler lever, feeler lever The fixed block corresponding with card convex is provided with neck;Mutually welded with the thread complete set outside hydraulic pressure capsule on the top of hydraulic jack Even;Thread complete set is internally provided with the pressure sensor of sensing hydraulic pressure capsule pressure;
The outside Fuel Tanking Unit includes electric oil pump station and outside oil conservator;Described electric oil pump station passes through in-line point It is not connected with hydraulic jack and hydraulic pressure capsule;The hydraulic jack and hydraulic pressure capsule are stored up by going out oil return line with outside respectively Oily device is connected;Be provided with described in-line into oil control valve, go out on oil return line to be provided with unidirectionally go out oil control valve;
The external memory is the digital display stress sheet with store-memory function, and input and the sensing of digital display stress sheet are filled Drilling rod, feeler lever in putting are connected with the DOL Data Output Line of pressure sensor inside.
2. a kind of recoverable drilling hole stress monitoring device according to claim 1, it is characterised in that:The phase of the small opening Adjacent spacing is 50-55cm.
3. a kind of recoverable drilling hole stress monitoring device according to claim 1 or 2, it is characterised in that:The small opening Position is provided with the anticreep hoop for preventing that hydraulic pressure capsule from slipping.
4. a kind of monitoring method of the recoverable drilling hole stress monitoring device described in claim 1, it is characterised in that including with Lower step:
(1)This monitoring device is assembled, feeler lever is sent into and specified at drilling depth by mining geological drilling rig;
(2)Open it is all enter oil control valve, start electric oil pump station, hydraulic oil passes through hydraulic jack in-line and injects hydraulic pressure Jack, hydraulic jack drives the hydraulic pressure capsule at the top of it to be ejected from oval small opening;Meanwhile, injected into hydraulic pressure capsule After hydraulic oil, by pressure conduction to pressure sensor, and it is output on digital display stress sheet and is shown by DOL Data Output Line; After hydraulic pressure capsule is from the removal of oval small opening, closes on hydraulic jack oil inlet pipe and enter oil control valve;Observe simultaneously outside The numerical value change of digital display stress sheet, setting value is reached when pressure sensor is conducted through next pressureP 0When, electric oil pump station is closed, And simultaneously close off and enter oil control valve on hydraulic pressure capsule in-line, into drilling hole stress monitoring state, and record digital display stress Table numerical value change;
(3)It is to be monitored terminate, open it is all go out oil control valve, then the hydraulic oil in hydraulic pressure capsule and hydraulic jack is through fuel-displaced time Road flows into outside oil conservator, and hydraulic pressure capsule is retracted into feeler lever with the retraction of hydraulic jack, set back;
(4)Mining geological drilling rig is controlled, feeler lever is removed from drilling, completes to reclaim.
5. a kind of monitoring method of recoverable drilling hole stress monitoring device according to claim 4, it is characterised in that:Institute State step(2)InP 0For 2-3MPa.
6. a kind of monitoring method of recoverable drilling hole stress monitoring device according to claim 4, it is characterised in that:Prison After survey terminates, the situation of change of drilling hole stress can be shown and recorded from digital display stress sheet according to the propulsion of coal-face, with Working face is abscissa away from monitoring hole spacing, and drilling hole stress reading is ordinate, draws the relationship of the two curve, further analysis Study the situation of change of drilling hole stress.
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