Filling type gob-side entry retaining fully mechanized caving face gob spontaneous combustion monitoring pipe

Abstract

The utility model discloses a filling type gob-side entry retaining fully mechanized caving face gob spontaneous combustion monitoring pipe which comprises a supporting pipe, a high-pressure rubber pipe and a protection pipe head which are sequentially connected from left to right, a testing pipeline penetrates through the supporting pipe, the left end of the testing pipeline extends out of the left side of the supporting pipe, and the right end of the testing pipeline extends into the protection pipe head. The protection tube head is provided with a sieve pore floral tube, a plurality of sieve pores are formed in the sieve pore floral tube in the length direction of the tube wall of the sieve pore floral tube, and a tube opening, away from one end of the high-pressure rubber tube, of the supporting tube is subjected to sealing treatment to prevent air leakage. The device can be used for solving the problems that a filling wall is not tightly sealed and the arrangement depth of a measuring point is difficult to control due to the fact that a filling type entry retaining pipe is used for monitoring goaf spontaneous ignition parameters.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of coal mine fire monitoring and prevention, in particular to a filling type along empty roadway retained roadway goaf spontaneous combustion monitoring pipe of fully mechanized caving face. BACKGROUND

[0002] In order to solve the problems such as gas accumulation in the upper corner area of the traditional U-shaped ventilation system fully mechanized face, improve the utilization efficiency of the roadway, and relieve the imbalance between mining and excavation, the along empty roadway retained roadway method is proposed. By establishing a Y-shaped ventilation system of the working face, not only the problem of gas accumulation in the upper corner area is solved, but also the gas inflow of the mining face is reduced. Moreover, by controlling the air volume of the two air inlet roadways, the air pressure difference between the inlet and outlet ports is reduced, and the ventilation effect and production conditions of the fully mechanized face are improved. However, compared with the U-shaped ventilation, the Y-shaped ventilation working face has larger air volume, more air leakage channels on the retained roadway side, and increased hazard of spontaneous combustion of residual coal. When the goaf gas extraction is treated, the ventilation leads to increased air leakage and expanded oxidation zone of the mining area, and the hazard of spontaneous combustion of residual coal needs to be reduced. The along empty roadway retained roadway has a long service and maintenance cycle, the distance between the air leakage area on the retained roadway side and the working face trend is positively correlated, and the spontaneous combustion danger area exists on the retained roadway side for a long time, so the monitoring and treatment are difficult.

[0003] According to whether the along empty roadway retained roadway is constructed with a filling wall, the along empty roadway retained roadway used as the mining roadway adjacent to the working face can be divided into the filling type along empty roadway retained roadway and the top cutting type along empty roadway retained roadway (110 / N00 method). The top cutting type retained roadway is automatically formed by combining the roof pre-cutting seam with the gangue retaining support, and the roadway side is automatically formed by the collapsed rock mass accumulation, so that no additional support material is needed. However, the compaction degree of the rock roadway side is low, the air volume and air pressure of the retained roadway are large, the air leakage of the goaf is serious, and the hazard of coal spontaneous combustion is significantly increased. The filling type retained roadway constructs the wall by pre-injecting high water material, concrete, gangue, etc. as the roadway side of the retained roadway, supports the roof, and effectively reduces the air leakage of the lateral goaf of the retained roadway, which is more conducive to the prevention and control of coal spontaneous combustion. CONTENT OF THE UTILITY MODEL

[0004] In view of the above technical deficiencies, the utility model aims at providing a filling type along empty roadway retained roadway fully mechanized caving face goaf spontaneous combustion monitoring pipe, which can solve the problem of poor sealing of the filling wall caused by the filling type retained roadway pipe monitoring goaf spontaneous combustion parameters and the problem of difficult control of the depth of the measuring point arrangement.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] The utility model provides a kind of filling type along empty roadway retaining comprehensive mechanized caving face goaf spontaneous combustion monitoring tube, including support tube, high-pressure rubber tube and protection pipe head being connected sequentially from left to right and being internally penetrated with test pipeline, the left end of the test pipeline is stretched out beyond support tube left side, the right end of the test pipeline is stretched into protection pipe head, the protection pipe head is equipped with sieve hole flower pipe, the sieve hole flower pipe is opened with several sieve holes along its pipe wall length direction, the support tube is sealed at the pipe opening of its one end away from high-pressure rubber tube, prevents air leakage.

[0007] Preferably, the support tube and high-pressure rubber tube are connected through an adapter, the adapter includes an inner thread straight-through and a caliper straight-through consolidated together, the support tube is provided with an outer thread adapted to the inner thread straight-through; one end of the high-pressure rubber tube is fixed to the caliper straight-through of the adapter through the caliper.

[0008] Preferably, the protection pipe head includes a consolidated quarter pipe and a caliper joint, the quarter pipe is a sieve hole flower pipe with a length of 300 mm and a diameter of 25-40 mm, the high-pressure rubber tube is fixed to the caliper joint through the caliper.

[0009] Preferably, the sieve hole is an air hole with a diameter of 2-5 mm, the air hole is provided with four groups along the length direction of the quarter pipe, each group has four air holes, and each group is arranged axially along the full length of the quarter pipe with a spacing of 20 mm.

[0010] Preferably, the support tube is a seamless steel pipe.

[0011] Preferably, the connection between the protection pipe head and the high-pressure rubber tube is sealed with polyurethane or yellow clay.

[0012] Preferably, the high-pressure rubber tube is a steel wire braided reinforced hydraulic rubber hose in accordance with GB / T 3683, with an inner diameter not less than 38 mm.

[0013] Preferably, the test pipeline cable includes a cable and a monitoring sensor, the cable is wrapped with a pressure-resistant PE pipe, and the monitoring sensor is a temperature sensor AD590.

[0014] The utility model has the advantages that the monitoring tube is designed for filling type along empty roadway retaining comprehensive mechanized caving face, can pass through wall pipe insertion to arrange the test line and protection sleeve from the filling body of along empty roadway retaining into the goaf, and use traction equipment to arrange the measuring point to different distance positions from the filling body. The test pipeline arrangement mode of the utility model can effectively reduce the influence of pipeline arrangement on air leakage of the filling body, shorten the pipeline arrangement distance, effectively monitor the distribution range and change rule of the spontaneous combustion danger area on one side of the filling body, improve the test efficiency and test precision of the "three zones" of the goaf spontaneous combustion, and provide a scientific basis for coal spontaneous combustion prediction. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0016] Figure 1 The arrangement schematic diagram of the spontaneous combustion monitoring pipe provided by the embodiment of the present application is shown in the figure.

[0017] Figure 2 The arrangement schematic diagram (top view) of multiple spontaneous combustion monitoring pipes provided by the embodiment of the present application is shown in the figure.

[0018] Figure 3 The lateral schematic diagram of the arrangement mode of the spontaneous combustion monitoring pipe in the rear scraper conveyor of the support is shown in the figure.

[0019] Figure 4 The structural schematic diagram of the spontaneous combustion monitoring pipe provided by the embodiment of the present application is shown in the figure.

[0020] Figure 5 The structural schematic diagram of the adapter provided by the embodiment of the present application is shown in the figure.

[0021] Figure 6 The structural schematic diagram of the protection pipe head provided by the embodiment of the present application is shown in the figure.

[0022] Explanation of reference signs:

[0023] 1 - plugging material; 2 - support pipe; 3 - adapter; 4 - high-pressure rubber pipe; 5 - protection pipe head; 6 - test pipeline; 7 - wall; 8 - goaf; 9 - sealing material; 11 - rear scraper conveyor; 12 - iron wire; 13 - hydraulic support; 31 - caliper straight through; 32 - internal thread straight through; 33 - caliper; 51 - screen hole; 52 - caliper joint; 53 - quarter pipe. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] As Figures 4-6As shown, this embodiment provides a filling-type spontaneous combustion monitoring pipe for the goaf of a fully mechanized caving working face with goaf-retaining lanes, comprising a support pipe 2, a high-pressure hose 4 and a protective pipe head 5, which are connected in sequence from left to right and have a test pipeline 6 running through them. The left end of the test pipeline 6 extends out of the left side of the support pipe 2, and the right end of the test pipeline 6 extends into the protective pipe head 5. The protective pipe head 5 is provided with a sieve hole flower pipe, and the sieve hole flower pipe has a plurality of sieve holes 51 along the length direction of its pipe wall. The support pipe 2 is sealed at the pipe mouth away from the high-pressure hose 4 to prevent air leakage.

[0026] The support tube 2 and the high-pressure hose 4 are connected through a transfer interface 3, and the transfer interface 3 includes an internal thread straight through 32 and a caliper straight through 31 solidified together. The support tube 2 is provided with an external thread adapted to the internal thread straight through 32; one end of the high-pressure hose 4 is fixed to the caliper straight through 31 of the transfer interface 3 through a caliper 33.

[0027] The protective pipe head 5 includes a fixed four-branch pipe 53 and a caliper joint 52. The four-branch pipe 53 is a sieve-shaped flower pipe with a length of 300 mm and a diameter of 25-40 mm. The high-pressure rubber hose 4 is fixed to the caliper joint 52 by a caliper.

[0028] The sieve holes 51 are pores with a diameter of 2-5 mm. The pores are arranged in four groups along the length of the quarter pipe 53, with four pores in each group. Each group is spaced 20 mm apart and arranged axially along the entire length of the quarter pipe.

[0029] The support tube is a seamless steel tube with an outer diameter of 56-114 mm.

[0030] The sealing plugging material 1 is used for the connection between the protective pipe head 5 and the high-pressure rubber hose 4. Generally, priority is given to mining flexible plugging materials or other mine-approved surface spraying materials. In this embodiment, polyurethane or yellow mud is selected.

[0031] The high-pressure hose 4 is a steel wire braided reinforced hydraulic rubber hose that complies with GB / T 3683 and has an inner diameter of not less than 38 mm;

[0032] The test pipeline 6 cable includes a cable and a monitoring sensor. The cable is wrapped with a pressure-resistant PE tube, and the monitoring sensor is a temperature sensor AD590.

[0033] like Figures 1-3 As shown, this embodiment provides a method for arranging spontaneous combustion monitoring pipelines in the goaf of a fully-mechanized caving working face with filling-type goaf-side entry retention, which is used to accurately measure the gas composition of the goaf 8 and determine the "three zones" of spontaneous combustion in the goaf on the entry retention side. The specific steps are:

[0034] The support pipe 2 is arranged in the reserved hole of the filling bag before the wall 7 is filled, and after the wall 7 is filled with the support material and is stable, the sealing material 9 is sprayed at the joint between the support pipe 2 and the hole wall, so as to prevent air leakage at the contact position between the wall 7 and the support pipe 2.

[0035] During the working face mining, the hydraulic support 13 is moved to the front of the reserved support pipe 2, the inner wire straight-through 32 of the support pipe 2 connected with the adapter 3 at one side of the goaf, the adapter 3 is connected with the high-pressure rubber pipe 4 through the clamp straight-through 31 at the other end, the high-pressure rubber pipe 4 is connected with the clamp joint 52 of the protection pipe head 5 through the clamp 33 in front of the high-pressure rubber pipe 4. The protection pipe head 5 is made of four-pipe 53.

[0036] The protection pipe head 5 is provided with a plurality of screen holes 51;

[0037] The front end of the test pipeline 6 is bound with iron wire, and the test pipeline is put into the support pipe 2 from the side of the roadway and passes through the wall 7, and the test pipeline passes through the high-pressure rubber pipe 4 to the protection pipe head 5 by using the iron wire.

[0038] An appropriate amount of polyurethane or other high molecular leakage stopping material 1 is sprayed at the bottom of the protection pipe head 5 and the opening of the support pipe 2.

[0039] The protection pipe head 5 is connected with the traction equipment such as hand-operated hoist by using iron wire 12, and the high-pressure rubber pipe 4 is pulled straight into the goaf through the rear scraper conveyor 11.

[0040] The high-pressure rubber pipe 4 is arranged at the outer edge of the rear scraper conveyor 11 and is fixed on the roof support anchor net by using iron wire, and when the hydraulic support 13 and the rear scraper conveyor 11 move forward, the high-pressure rubber pipe 4 directly falls into the goaf, and the single test point arrangement is completed.

[0041] According to the daily advancing speed of the working face and the number of filling wall construction per day, the number of test point arrangement, arrangement interval and the distance of being buried into the goaf are determined, and the remaining test points are arranged in sequence according to the single test point arrangement method.

[0042] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technology, the present application also intends to include these modifications and variations.

Claims

1. A filling-type spontaneous combustion monitoring pipe for goaf of fully mechanized caving working face with goaf-side entry retention, characterized by: The invention comprises a support tube (2), a high-pressure rubber hose (4) and a protective tube head (5) which are sequentially connected from left to right and have a test line (6) passing through the support tube (2), wherein the left end of the test line (6) extends out of the left side of the support tube (2), and the right end of the test line (6) extends into the protective tube head (5). The protective tube head (5) is provided with a sieve hole flower tube, and the sieve hole flower tube has a plurality of sieve holes (51) along the length direction of the tube wall. The support tube (2) is sealed at the tube mouth away from the high-pressure rubber hose (4) to prevent air leakage.

2. A filling-type spontaneous combustion monitoring pipe for goaf of a fully mechanized caving working face with goaf-side entry retention as claimed in claim 1, characterized in that: The support tube (2) and the high-pressure rubber hose (4) are connected via a transfer interface (3), wherein the transfer interface (3) comprises an internal thread through-hole (32) and a caliper through-hole (31) that are fixed together, and the support tube (2) is provided with an external thread that is compatible with the internal thread through-hole (32); one end of the high-pressure rubber hose (4) is fixed to the caliper through-hole (31) of the transfer interface (3) via a caliper (33).

3. The filling-type spontaneous combustion monitoring pipe for goaf of a fully mechanized caving working face with goaf-side entry retention as claimed in claim 2, characterized in that: The protective pipe head (5) comprises a fixed four-branch pipe (53) and a caliper joint (52). The four-branch pipe (53) is a sieve-shaped flower pipe with a length of 300 mm and a diameter of 25-40 mm. The high-pressure rubber hose (4) is fixed to the caliper joint (52) by a caliper.

4. A filling-type spontaneous combustion monitoring pipe for goaf of a fully mechanized caving working face with goaf-side entry retention as claimed in claim 3, characterized in that: The sieve holes (51) are pores with a diameter of 2-5 mm. The pores are arranged in four groups along the length direction of the quarter pipe (53), with four pores in each group. Each group is axially arranged along the entire length of the quarter pipe at intervals of 20 mm.

5. The filling-type spontaneous combustion monitoring pipe for goaf of fully mechanized caving working face with goaf-side entry retention as claimed in claim 1, characterized in that: The support pipe (2) is a seamless steel pipe.

6. The filling-type spontaneous combustion monitoring pipe for goaf of fully mechanized caving working face with goaf-side entry retention as claimed in claim 1, characterized in that: The connection between the protective pipe head (5) and the high-pressure rubber hose (4) is sealed with polyurethane or yellow mud.

7. The filling-type spontaneous combustion monitoring pipe for goaf of fully mechanized caving working face with goaf-side entry retention as claimed in claim 1, characterized in that: The high-pressure rubber hose (4) is a steel wire braided reinforced hydraulic rubber hose that complies with GB / T 3683 and has an inner diameter of not less than 38 mm.

8. The filling-type spontaneous combustion monitoring pipe for goaf of a fully mechanized caving working face with goaf-side entry retention as claimed in claim 1, characterized in that: The test pipeline (6) cable comprises a cable and a monitoring sensor. The cable is wrapped with a pressure-resistant PE tube. The monitoring sensor is a temperature sensor AD590.

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