CN207004577U - Stope coal seam plate destructing depth real-time system for monitoring and pre-warning - Google Patents

Abstract

The utility model discloses a kind of stope coal seam plate destructing depth real-time system for monitoring and pre-warning, system includes the multiple drillings being arranged in each even lane working face, distributed strain sensing optic cable is buried respectively in each drilling, multiple data acquisition substations are disposed with mine in air return way, each distributed strain sensing optic cable connected in lane connects with corresponding data acquisition substation respectively, each data acquisition substation is connected by mining network with multichannel substation controller again after being connected to each other by optical cable, the monitoring station is connected by strain acquirement instrument with multichannel substation controller.The utility model can carry out remote operation on ground, save substantial amounts of manpower and materials, even implementing in lane, drilling the data obtained body is very big, can good reaction entirely adopt floor damage of working face, can solve the problem of current instrument single channel test using multichannel substation controller.

Description

Stope coal seam plate destructing depth real-time system for monitoring and pre-warning

Technical field

Seam Floor Failure early warning system field is the utility model is related to, specifically a kind of stope coal seam bottom plate is broken Bad depth real-time system for monitoring and pre-warning.

Background technology

With petering out for superficial part coal resources, coal mining is just tending to deepization development, and now deep mining is by face Facing " a three high disturbances " influences so that mining conditions complicate compared with superficial part.When institute's mining coal seam bottom plate is rich in a large amount of limestone artesian waters When, will implement it is " with pressure " exploitation, now in order to ensure mine safety efficiently produce need to hold comprehensively coal seam floor failure rule and It is accurate to determine bottom plate Mining failure band depth.

At present, the research for plate destructing depth has experience formula, theoretical calculation formula, numerical simulation, similar physics Simulated test, field measurement etc., the derivation of equation are mostly based on the foundation of shallow-layer geological conditions, are difficult to fit when entering deep mining With wherein mainly inclining applied to the measuring technology that determination plate destructing depth and rule are sought in stope construction of bottom plates Inclined borehole, drilling extend to bottom plate normal position, at the same drilling afterbody reserve 2m open-hole as note, discharge water observation station, remaining Hole section slip casting blocks, during monitoring by water of noting, discharge water number determine coal seam floor failure cranny development degree, reach between point type Disconnected monitoring effect；Later stage proposes a kind of multiloop drilling to reach monitoring coal seam floor failure purpose, Zhang Wenquan, Zhang Hong etc. in real time Note, drainage system；Liu Chuanwu etc. is entered using propagation characteristic of the sound wave in different medium to stope bottom plate degree of crushing Row in-situ measurement；Zhang Pingsong etc. once uses seismic wave CT technology, and observes section between combination working face of coal seam exploitation process mesopore-lane Dynamic Data Acquiring and processing are carried out, coal seam floor failure rule is studied；Pay cyclopentadienyl and such as utilize resistivity CT detection back production works Make face plate destructing depth；Sun Binyang etc. is using distribution type fiber-optic and combines resistivity CT acquisition stope sill damage envelopes.

The above method is limited by self-condition, and underground construction is cumbersome and detection accuracy is relatively low, while coal work environment Many uncertain factors be present causes to be difficult to the effect for reaching continuous dynamic monitoring.Though wherein seismic wave CT, resistivity CT etc. are obtained More effective data, but arrangement drilling in underground is more at present be located at air return way, implements inclined drill, the control range that drills compared with It is difficult to the actual destruction situation for reflecting the regions such as working face middle part for limitation.And underground actual measurement at present is mostly manual site Operation, it is impossible to carry out Continuous Observation and disaster alarm.

Utility model content

The purpose of this utility model is to provide a kind of stope coal seam plate destructing depth real-time system for monitoring and pre-warning, To solve the problems, such as that prior art is difficult to reach the effect of continuous dynamic monitoring, can not carry out Continuous Observation and disaster alarm.

In order to achieve the above object, technical scheme is used by the utility model：

Stope coal seam plate destructing depth real-time system for monitoring and pre-warning, it is characterised in that：Including being arranged in mine In each connect multiple drillings in the working face of lane, bury distributed strain sensing optic cable respectively in each drilling and noted using slurries Slurry is sealed, and is disposed with multiple data acquisition substations in mine in air return way, and multiple data acquisition substations are corresponded and are arranged on Each to connect outside lane, the distributed strain sensing optic cable each connected in each drilling in lane extends to air return way by connection respectively In with corresponding data acquisition substation connect, each data acquisition substation is connected to each other by optical cable, in addition to is arranged on ground On multichannel substation controller, strain acquirement instrument, monitoring the station, each data acquisition substation be connected to each other by optical cable after again It is connected by mining network with multichannel substation controller, the monitoring station is connected by strain acquirement instrument and multichannel substation controller Connect；The data of each distributed strain sensing optic cable collection are gathered by corresponding data acquisition substation, then by each data acquisition The data of collection are sent to multichannel substation controller by substation, and strain acquirement instrument passes through multichannel substation controller switching channel To gather the data of distributed strain sensing optic cable in different even lanes, and the data of collection are sent to monitoring by strain acquirement instrument The station.

Described stope coal seam plate destructing depth real-time system for monitoring and pre-warning, it is characterised in that：Each even lane Drilling in working face is numbered successively.

Described stope coal seam plate destructing depth real-time system for monitoring and pre-warning, it is characterised in that：Each drilling It is respectively facing and cuts a direction and parallel with mining direction, the controlling depth of drilling should be greater than the plate destructing depth h of theoretical calculation, The plate destructing depth h of theoretical calculation is calculated by formula (1)：

H=0.0085H+0.1665 α+0.1079L-4.3579 (1),

In formula (1), H is seam mining height, and L is stope width, and α is seam inclination.

Described stope coal seam plate destructing depth real-time system for monitoring and pre-warning, it is characterised in that：Multichannel point One passage of station control connects a data acquisition substation, is switched inside multichannel substation controller by grammed switch each Passage, the foundation of grammed switch switching are the time required for each borehole test, and the time is set by strain acquirement instrument Acquisition parameter depending on.

Compared with the prior art, the beneficial effects of the utility model are embodied in：

1st, coal seam floor failure Detection Techniques conventional at present still need manually to carry out underground actual measurement, and operating efficiency is relatively low, and Underground work environment is more severe, and some instruments are difficult to normal work.The utility model after borehole observation system is arranged, Ground carries out remote operation, saves substantial amounts of manpower and materials, while operating efficiency greatly improves.

2nd, current bottom plate implement drilling due to even lane later stage can be blocked more be arranged in air return way, measured resistance Rate or strain are only capable of reflecting one region coal seam floor failure situation of working face, unpredictable whole working face bottom plate during back production Actual collapse dept.And implement drilling in the utility model Ze Shilian lanes, and be drilling group, transmitted after burying good optical cable Optical cable then extends to return air main entry along above rib, and the later stage connects lane closure not to be influenceed on it, and the data obtained body is very big, Can good reaction entirely adopt floor damage of working face.

3rd, the utility model proposes the mode of substation arrangement drilling, can solve current instrument using multichannel substation controller The problem of single channel test.

4th, mining active process bottom plate rock stratum strain trend can be monitored in real time, and each lithology occurs broken according to obtained by laboratory test The strain extreme value of bad when judges whether rock stratum crushes, and alarm is then sent when collapse dept is more than water-resisting floor thickness, Remind staff.

Brief description of the drawings

Fig. 1 is stope coal seam plate destructing depth real-time system for monitoring and pre-warning layout drawing.

Fig. 2 is that bottom plate implements Hole cross-section plotting.

Embodiment

As shown in figure 1, a kind of stope coal seam plate destructing depth real-time system for monitoring and pre-warning, it includes：

Bottom plate drilling fiber optic testing system：Suitable region implementation bottom plate drilling is even being chosen in lane for working face, is being bored Hole design parameter meets following 2 points of requirements：(1) drilling should be and parallel with mining direction towards cutting a direction；(2) drilling control Depth processed should be greater than the plate destructing depth of theoretical calculation, and theoretical depth is calculated by formula (1)：

H=0.0085H+0.1665 α+0.1079L-4.3579 (1),

In formula (1), H is seam mining height, and L is stope width, and α is seam inclination.

After the completion of drilling construction, the installation of distributed strain sensing optic cable is carried out, distributed strain sensing optic cable installs Complete opening slip casting is carried out using slurries into rear, distributed strain sensing optic cable in hole is finally extended into return air using mining connection Data acquisition substation corresponding to crossheading Bing Yulian lanes connects.Above step is repeated, completes whole working face inner bottom plating drilling construction And the installation of distributed strain sensing optic cable.Then according to mining area lithological column, working face internal drilling profile is drawn, is such as schemed Shown in 2, and control each drilling across lithology interface, as the 1# drillings in Fig. 2 across lithologic interface be respectively 0-l₁₁ For sand shale, l₁₁-l₁₂For mud stone burning into sand rock, l₁₂-l₁₃For sand shale, l₁₃-l₁₄For sand shale, l₁₄-l₁₅For sand shale, l₁₅-l₁₆ For middle sandstone.

Multichannel substation control system：Multiple data acquisition substations and the multichannel substation controller on ground are configured in underground Connection.The purpose of the data acquisition substation of underground is in order to by single even distributed strain sensing optic cable collection in each drilling in lane In in a subsystem, then by transmission cable by multiple data acquisition substations be connected and by mining network connection to ground Multichannel substation control system.Its operation principle is logical using program control arbitrarily switching of opening the light inside multichannel substation controller Road, to complete the strain testing of distributed strain sensing optic cable in each subsystem drilling.And the foundation of grammed switch switching is Time required for each borehole test, time are then system carrying completions depending on the acquisition parameter set by strain acquirement instrument It is input to the time required to calculating each drilling during adjusting acquisition parameter by pre-acquired background value afterwards in advance in the form of code Inside strain acquirement instrument.

Bottom plate borehole strain data acquisition：Data acquisition is completed using distributed strain sensing optic cable, the distributed strain The single-ended transmitting of sensing optic cable is received, and can carry out long distance monitoring, and strain sensitivity is controlled in ± 50 μ ε, and can substantially meet test needs Ask.The pre-acquired of data is carried out after the solidification completely of hole to be drilled group of inside slurries, the purpose of pre-acquired is to obtain each drilling Suitable acquisition parameter, the strain data for then being carried out each drilling respectively using multichannel substation controller is gathered, and is defined The drilling group data volume of initial acquisition is background value, and the later stage sets monitoring cycle according to working face extraction progress.Repeat above-mentioned step Suddenly, until working face extraction is completed to obtain complete floor strata strain data body.

Claims (4)

1. stope coal seam plate destructing depth real-time system for monitoring and pre-warning, it is characterised in that：Including being arranged in mine Each multiple drillings connected in the working face of lane, distributed strain sensing optic cable is buried in each drilling respectively and uses slurries slip casting Seal, be disposed with multiple data acquisition substations in mine in air return way, multiple data acquisition substations, which correspond, to be arranged on respectively Outside Ge Lian lanes, the distributed strain sensing optic cable each connected in each drilling in lane is extended in air return way by connection respectively Connected with corresponding data acquisition substation, each data acquisition substation is connected to each other by optical cable, in addition to is set on the ground Multichannel substation controller, strain acquirement instrument, the monitoring station, each data acquisition substation leads to again after being connected to each other by optical cable Cross mining network to be connected with multichannel substation controller, the monitoring station is connected by strain acquirement instrument and multichannel substation controller Connect；The data of each distributed strain sensing optic cable collection are gathered by corresponding data acquisition substation, then by each data acquisition The data of collection are sent to multichannel substation controller by substation, and strain acquirement instrument passes through multichannel substation controller switching channel To gather the data of distributed strain sensing optic cable in different even lanes, and the data of collection are sent to monitoring by strain acquirement instrument The station.

2. stope coal seam plate destructing depth real-time system for monitoring and pre-warning according to claim 1, its feature exist In：Drilling in each even lane working face is numbered successively.

3. stope coal seam plate destructing depth real-time system for monitoring and pre-warning according to claim 1, its feature exist In：Each drilling, which is respectively facing, cuts a direction and parallel with mining direction, and the controlling depth of drilling should be greater than the bottom of theoretical calculation Plate collapse dept h, the plate destructing depth h of theoretical calculation are calculated by formula (1)：

H=0.0085H+0.1665 α+0.1079L-4.3579 (1),

In formula (1), H is seam mining height, and L is stope width, and α is seam inclination.

4. stope coal seam plate destructing depth real-time system for monitoring and pre-warning according to claim 1, its feature exist In：One passage of multichannel substation controller connects a data acquisition substation, by program control inside multichannel substation controller Switch switches each passage, and the foundation of grammed switch switching is the time required for each borehole test, and the time is then by answering Become depending on the acquisition parameter that Acquisition Instrument is set.