Gas-containing coal seam roadway rapid tunneling method based on hydraulic fracturing pressure relief

Abstract

The invention belongs to the field of coal mine rock burst and gas control, and particularly relates to a gas-containing coal seam roadway rapid tunneling method based on hydraulic fracturing pressure relief, which comprises the following steps: constructing directional main drill holes in a transportation gate road and an air return gate road from a transportation main roadway, and constructing directional branch holes from the directional main drill holes to a first working face stoping area; the directional branch holes and the directional main drill hole are used for conducting hydraulic fracturing pressure relief on the coal seam; tunneling the transportation gate road from the transportation main roadway, tunneling a cut hole from the transportation gate road to the air return gate road, and tunneling the air return gate road from the cut hole to the air return main roadway; in the tunneling process, air flows in through the transportation crossheading and flows out through the air return crossheading; and roadway tunneling is conducted on the next working face according to the mode. According to the method, the pressure of the gate road is relieved through the directional main drill hole, the pressure of the mining area of the working face is relieved through the directional branch holes, a smooth path for gas extraction is formed, gas newly generated by the tunneling face can be extracted, and the influence of rock burst and gas on roadway tunneling is avoided.

Description

Technical Field

[0001] The present invention belongs to the field of prevention and control of rock bursts and gas in coal mines, and particularly relates to a rapid roadway driving method for gas-bearing coal seams based on hydraulic fracturing pressure relief. Background Art

[0002] The longwall caving method is the most commonly used method in coal production. In order to prevent gas disasters caused by gas accumulated in the goaf, it is stipulated to adopt retreating coal mining, so it is necessary to pre-drive the haulage gateway, return airway and cut-through of the working face in advance. However, roadway driving is generally one-way driving, that is, driving from one end of the roadway to the other end. Therefore, a smooth ventilation path cannot be formed at the heading face, and the coal dust is large. For gas-bearing coal seams with impact proneness, gas is likely to accumulate when the ventilation is not smooth, causing gas poisoning, and in severe cases, gas explosion will also occur. In addition, affected by the impact proneness of the coal seam, rock bursts will also occur during the driving process. Therefore, how to reduce the impact of gas and rock bursts on roadway driving, improve the ventilation quality, and ensure the roadway driving efficiency has become the key to improving coal production efficiency. Summary of the Invention

[0003] In view of the above deficiencies of the prior art, the present invention proposes a rapid roadway driving method for gas-bearing coal seams based on hydraulic fracturing pressure relief, including the following steps:

[0004] S1: Construct directional main boreholes in the haulage gateway along the axial direction of the haulage gateway from the main haulage roadway, and construct directional main boreholes in the return airway along the axial direction of the return airway from the main return airway; construct several directional branch boreholes from the directional main boreholes to the first working face extraction area; use the directional branch boreholes to perform hydraulic fracturing pressure relief on the coal seam in the first working face extraction area, so that the fracturing cracks formed by hydraulic fracturing communicate with each other; use the directional main boreholes to perform hydraulic fracturing pressure relief on the coal seams in the haulage gateway and the return airway;

[0005] S2: Drive the haulage gateway from the main haulage roadway, then drive the cut-through from the haulage gateway towards the return airway direction, and then drive the return airway from the cut-through towards the main return airway direction; during the driving process, make the air flow in through the haulage gateway and flow out through the return airway;

[0006] S3: Drive the roadway of the next working face according to steps S1-S2.

[0007] Preferably, in step S1, the directional branch boreholes constructed from the haulage gateway and the return airway intersect in the first working face extraction area.

[0008] Preferably, in step S2, before driving, make the air flow in through the haulage gateway and flow out through the return airway to pre-pump the gas in the first working face.

[0009] Preferably, in step S3, the next working face is the second working face adjacent to the first working face. A sectional coal pillar is left between the second working face and the first working face. The rapid driving of the roadway for the second working face is carried out according to steps S1-S2; then a sectional coal pillar is continuously left between the second working face and the previous working face, and the rapid driving of the roadway for the subsequent working face is carried out according to steps S1-S2.

[0010] Preferably, in step S3, the next working face is the Nth working face separated from the first working face by several working faces.

[0011] Preferably, in step S3, the gas content of the several separated working faces is lower than that of the first working face and the Nth working face.

[0012] Preferably, for the several separated working faces, it further includes:

[0013] S4: Construct hydraulic fracturing boreholes in the cut-eye connecting roadway from the cut-eye of the Nth working face towards the cut-eye of the first working face, and relieve the pressure of the coal seam in the cut-eye connecting roadway through hydraulic fracturing; then drive the cut-eye connecting roadway in the same direction.

[0014] S5: Construct hydraulic fracturing boreholes along the axial direction of the transportation crossheading in the transportation crossheadings of the several separated working faces from the main transportation roadway, and construct hydraulic fracturing boreholes along the axial direction of the return air crossheading in the return air crossheadings of the several separated working faces from the main transportation roadway. Relieve the pressure of the coal seam in the return air crossheadings and transportation crossheadings of the several separated working faces through hydraulic fracturing; then start driving the return air crossheadings and transportation crossheadings of the several separated working faces from the main transportation roadway.

[0015] Preferably, in step S4, seal the transportation crossheading of the first working face and the return air crossheading of the Nth working face, so that the air flow direction is from the transportation crossheading and cut-eye of the Nth working face, through the cut-eye connecting roadway, to the cut-eye and return air crossheading of the first working face.

[0016] Preferably, in step S5, seal the transportation crossheading of the Nth working face, so that the air flow direction is from the return air crossheadings and transportation crossheadings of the several separated working faces, through the cut-eye connecting roadway, to the cut-eye and return air crossheading of the first working face.

[0017] Preferably, it further includes S6: Construct a sealing wall in the cut-eye connecting roadway to form the cut-eyes of the several separated working faces, disconnect the connection between the return air crossheadings of the several separated working faces and the main transportation roadway, and drive in the reverse direction to connect it with the return airway.

[0018] Preferably, the main transportation roadway is either a main transportation roadway or a transportation rise, and the corresponding return airway is a return rise.

[0019] The beneficial technical effects of the present invention are as follows: 1. In the roadway driving method of the present invention, the coal seams in the transportation gateway and the return airway are hydraulically fractured and pressure-relieved by using the directional main boreholes, and the coal seams in the working face mining area are hydraulically fractured and pressure-relieved by using the directional branch boreholes. Based on the directional boreholes and their fracturing fissures, a smooth flow path for gas is formed, and the newly generated gas at the roadway driving face can also be quickly extracted, avoiding the influence of rock bursts and gas on roadway driving. During the driving process of the present invention, the entire working face can be pressure-relieved and gas extracted.

[0020] 2. By setting the cut-through crossheading in the present invention, the rapid driving work of the working face with relatively low gas concentration can be quickly completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic plan view of the rapid driving of the roadway in the first working face of the present invention;

[0022] Figure 2 is a schematic plan view of the rapid driving of the roadway in the second working face in the first embodiment of the present invention;

[0023] Figure 3 is a schematic plan view of the rapid driving of the roadway and the cut-through crossheading in the fourth working face in the second embodiment of the present invention;

[0024] Figure 4 is a schematic plan view of the rapid driving of the roadways in the second and third working faces in the second embodiment of the present invention;

[0025] Figure 5 is a schematic plan view of each working face after the rapid driving of the roadways in all working faces in the second embodiment of the present invention is completed;

[0026] In the figure: The arrow indicates the roadway driving direction; the return airway main roadway 1, the transportation main roadway 2, the return airway 3, the transportation gateway 4, the cut-through 5, the directional main borehole 6a, the directional branch borehole 6b, the cut-through crossheading 7, the first sealing wall 8, the second sealing wall 9, the hydraulic fracturing borehole 10, the sectional coal pillar 11. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following introduces the specific embodiments of the present invention with reference to the drawings.

[0028] Embodiment 1

[0029] As Figure 1 - Figure 2 shown, the present invention provides a method for rapid driving of a gas-bearing coal seam roadway based on hydraulic fracturing pressure relief, including the following steps:

[0030] S1: As Figure 1As shown in the figure, a directional main borehole 6a is constructed along the axial center of the haulage gateway 4 from the main haulage roadway 2, and a directional main borehole 6a is constructed along the axial center of the return airway gateway 3 from the return airway main roadway 1. The haulage gateway 4 and the return airway gateway 3 are perpendicular to the main haulage roadway 2 and the return airway main roadway 1 respectively. The length direction of the directional main borehole 6a is consistent with the length directions of the haulage gateway 4 and the return airway gateway 3. The directional main borehole 6a is a borehole with a relatively large diameter.

[0031] Several directional branch boreholes 6b are constructed from the directional main borehole 6a to the first working face mining area (referring to the part mined by the longwall caving method using a shearer) and the cut-through 5. The several directional branch boreholes 6b are arranged at intervals along the length direction of the directional main borehole 6a, including constructing directional branch boreholes 6b from the haulage gateway 4 towards the return airway gateway 3, and constructing directional branch boreholes 6b from the return airway gateway 3 towards the haulage gateway 4. The directional branch boreholes 6b constructed from the haulage gateway 4 and the return airway gateway 3 intersect within the first working face. The coal seam in the first working face mining area and the cut-through 5 is hydraulically fractured and pressure-relieved by using the directional branch boreholes 6b, and the fracturing fissures formed by hydraulic fracturing communicate with each other. The coal seam at the haulage gateway 4 and the return airway gateway 3 is hydraulically fractured and pressure-relieved by using the directional main borehole 6a. Preferably, after hydraulic fracturing, a proppant is injected into the fracturing fissures to support the fracturing fissures.

[0032] S2: As Figure 1 shown in the figure, the air from the main haulage roadway 2 flows into the directional branch boreholes 6b and their fracturing fissures in the first working face mining area through the directional main borehole 6a and its fracturing fissures in the haulage gateway 4, carries the gas in the coal seam, and then flows out to the return airway main roadway 1 through the directional main borehole 6a and its fracturing fissures in the return airway gateway 3. In this way of gas extraction, the air is conducive to entering the coal seam in the first working face, and a smooth ventilation path can be formed, which is conducive to gas extraction.

[0033] Under this efficient gas extraction, while keeping the above ventilation path unchanged, the roadway driving work of the first working face is carried out:

[0034] The haulage gateway 4 is driven from the main haulage roadway 2. Before driving, the coal seam at the haulage gateway 4 has been pressure-relieved by hydraulic fracturing using the directional main borehole 6a, and gas pre-extraction has been carried out, which can provide a relatively safe environment for the driving of the haulage gateway 4. During the driving process of the haulage gateway 4, the newly generated gas at the heading face will flow from the haulage gateway 4 into the directional branch boreholes 6b and their fracturing fissures in the first working face mining area, carry the gas in the first working face mining area, and then flow out to the return airway main roadway 1 through the directional main borehole 6a and its fracturing fissures in the return airway gateway 3.

[0035] After the transportation gateway 4 is driven through, the cutting roadway 5 is driven from the transportation gateway 4 towards the return airway 3. At this time, part of the air entering the transportation gateway 4 will flow into the first working face mining area through the directional branch hole 6b and its fracturing fissures, carry the gas in the first working face mining area, and then enter the directional main hole 6a and its fracturing fissures in the return airway 3. Part of the gas carrying the newly generated gas during the driving at the heading face passes through the directional branch hole 6b and its fracturing fissures in the cutting roadway 5 and then enters the directional main hole 6a and its fracturing fissures in the return airway 3, and finally flows out to the return airway 1;

[0036] After the cutting roadway 5 is driven through, the return airway 3 is driven from the cutting roadway 5 towards the return airway 1. Before driving, the coal seam at the return airway 3 has been depressurized by hydraulic fracturing through the directional main hole 6a, and gas pre-extraction has been carried out, which can provide a relatively safe environment for the driving of the return airway 3; At this time, part of the air entering the transportation gateway 4 will flow into the first working face mining area through the directional branch hole 6b and its fracturing fissures, carry the gas in the first working face mining area, and then enter the directional main hole 6a and its fracturing fissures in the return airway 3. Part of it enters the return airway 3 through the cutting roadway 5, carries the newly generated gas during the driving at the heading face of the return airway 3, and then enters the directional main hole 6a and its fracturing fissures in the un-driven return airway 3, and finally flows out to the return airway 1;

[0037] S3: As Figure 2 shown, a sectional coal pillar 11 is left between the second working face and the first working face. The rapid driving of the roadway for the second working face is carried out according to steps S1 - S2, and then a sectional coal pillar 11 is continuously left between the second working face and the previous working face, and the rapid driving of the roadway for the subsequent working face is carried out according to steps S1 - S2.

[0038] Embodiment 2

[0039] As Figure 1 、 Figure 3 - Figure 5 shown, the present invention provides a method for rapid driving of a roadway in a gas-bearing coal seam, including the following steps:

[0040] S1: As Figure 1 shown, a directional main hole 6a is constructed along the axial center of the transportation gateway 4 from the transportation roadway 2, and a directional main hole 6a is constructed along the axial center of the return airway 3 from the return airway 1. The transportation gateway 4 and the return airway 3 are perpendicular to both the transportation roadway 2 and the return airway 1; The length direction of the directional main hole 6a is consistent with the length directions of the transportation gateway 4 and the return airway 3; The directional main hole 6a selects a drill hole with a larger aperture;

[0041] Several directional branch holes 6b are constructed from the self - orienting main borehole 6a to the first working face extraction area (referring to the part mined by the long - wall caving method using a shearer) and the cut - through 5. The several directional branch holes 6b are arranged at intervals along the length direction of the directional main borehole 6a, including constructing directional branch holes 6b from the conveyor gate 4 towards the return airway 3, and constructing directional branch holes 6b from the return airway 3 towards the conveyor gate 4; The directional branch holes 6b constructed from the conveyor gate 4 and the return airway 3 intersect within the first working face. The coal seam in the first working face extraction area and the cut - through 5 is hydraulically fractured and pressure - relieved by using the directional branch holes 6b, and the fracture fissures formed by hydraulic fracturing communicate with each other. The coal seam at the conveyor gate 4 and the return airway 3 is hydraulically fractured and pressure - relieved by using the directional main borehole 6a; Preferably, proppants are injected into the fracture fissures after hydraulic fracturing to support the fracture fissures;

[0042] S2: As Figure 1 shown, the air from the main haulage roadway 2 flows through the directional main borehole 6a and its fracture fissures in the conveyor gate 4 into the directional branch hole 6b and its fracture fissures in the first working face extraction area, carries the gas in the coal seam, and then flows out through the directional main borehole 6a and its fracture fissures in the return airway 3 to the return air main roadway 1; In this way of gas extraction, the air is conducive to entering the coal seam of the first working face, and a smooth ventilation path can be formed, which is conducive to gas extraction;

[0043] Under this efficient gas extraction, while keeping the above - mentioned ventilation path unchanged, the roadway driving work of the first working face is carried out:

[0044] The conveyor gate 4 is driven from the main haulage roadway 2. Before driving, the coal seam at the conveyor gate 4 has been pressure - relieved by hydraulic fracturing using the directional main borehole 6a, and gas pre - extraction has been carried out, which can provide a relatively safe environment for the driving of the conveyor gate 4; During the driving of the conveyor gate 4, the newly generated gas at the heading face will flow from the conveyor gate 4 into the directional branch hole 6b and its fracture fissures in the first working face extraction area, carry the gas in the first working face extraction area, and then flow out through the directional main borehole 6a and its fracture fissures in the return airway 3 to the return air main roadway 1;

[0045] After the conveyor gate 4 is driven, the cut - through 5 is driven from the conveyor gate 4 towards the return airway 3. At this time, part of the air entering the conveyor gate 4 will flow into the first working face extraction area through the directional branch hole 6b and its fracture fissures, carry the gas in the first working face extraction area, enter the directional main borehole 6a and its fracture fissures in the return airway 3, and part of it carries the newly generated gas at the heading face and enters the directional main borehole 6a and its fracture fissures in the return airway 3 after passing through the directional branch hole 6b and its fracture fissures in the cut - through 5, and finally flows out to the return air main roadway 1;

[0046] After driving through the cutting roadway 5, the return air heading 3 is driven from the cutting roadway 5 towards the return air main roadway 1. Before driving, the coal seam at the return air heading 3 has been depressurized by hydraulic fracturing through the directional main borehole 6a, and gas pre-extraction has been carried out, which can provide a relatively safe environment for the driving of the return air heading 3. At this time, part of the air entering the transportation heading 4 will flow into the first working face mining area from the directional branch borehole 6b and its fracturing fissures, carry the gas in the first working face mining area, enter the directional main borehole 6a and its fracturing fissures in the return air heading 3, part passes through the cutting roadway 5 and enters the return air heading 3, carry the newly generated gas at the heading face of the return air heading 3, enter the directional main borehole 6a and its fracturing fissures in the un-driven return air heading 3, and finally flow out to the return air main roadway 1.

[0047] S3: As Figure 3 shown, rapid driving of the roadway for the fourth working face is carried out according to steps S1 - S2. There are also the second working face and the third working face between the first working face and the fourth working face. Among them, the preferred applicable situation of Embodiment 2 is that the coal seam gas content of the second working face and the third working face is relatively low, and the coal seam gas content of the first working face and the fourth working face is relatively high.

[0048] S4: As Figure 3 shown, a hydraulic fracturing borehole 10 is constructed from the cutting roadway 5 of the fourth working face to the cutting roadway 5 of the first working face to carry out hydraulic fracturing and pressure relief on the coal seam in the cutting roadway connection 7. The hydraulic fracturing borehole 10 selects a borehole with a larger diameter. Preferably, after hydraulic fracturing, a proppant is injected into the fracturing fissures to support the fracturing fissures.

[0049] The transportation heading 4 of the first working face and the return air heading 3 of the fourth working face are sealed with the first sealing wall 8, so that the air flow direction is: from the transportation heading 4 and the cutting roadway 5 of the fourth working face, through the hydraulic fracturing borehole 10 and its fracturing fissures in the cutting roadway connection 7, to the cutting roadway 5 and the return air heading 3 of the first working face.

[0050] Keeping the above ventilation path unchanged, the cutting roadway connection 7 is driven from the cutting roadway 5 of the fourth working face towards the cutting roadway 5 of the first working face. Before driving, the coal seam in the cutting roadway connection 7 has been depressurized by the hydraulic fracturing borehole 10, and gas pre-extraction has been carried out, which can provide a relatively safe environment for the driving of the cutting roadway connection 7. During the driving of the cutting roadway connection 7, the newly generated gas at the heading face will also flow into the cutting roadway 5 and the return air heading 3 of the first working face from the hydraulic fracturing borehole 10 and its fracturing fissures in the un-driven cutting roadway connection 7, and flow out to the return air main roadway 1.

[0051] S5: As Figure 4As shown in the figure, hydraulic fracturing boreholes 10 are constructed along the axial centers of the return air roadways 3 and the conveyor roadways 4 of the second working face and the third working face from the main haulage roadway 2; the coal seams in the return air roadways 3 and the conveyor roadways 4 of the second working face and the third working face are hydraulically fractured and pressure-relieved through the hydraulic fracturing boreholes 10; the hydraulic fracturing boreholes 10 are boreholes with larger diameters; preferably, after hydraulic fracturing, proppants are injected into the fracturing cracks to support the fracturing cracks.

[0052] The conveyor roadway 4 of the fourth working face is sealed by the first sealing wall 8, so that the air flow direction is: from the hydraulic fracturing boreholes 10 and their fracturing cracks in the conveyor roadways 4 of the second working face and the third working face, and the hydraulic fracturing boreholes 10 and their fracturing cracks in the return air roadways 3, it flows into the cut-through roadway 7, and then through the first working face cut 5 and the return air roadway 3, and flows out to the return airway 1.

[0053] Keep the above ventilation path unchanged. At the same time, the conveyor roadways 4 and the return air roadways 3 of the second working face and the third working face are driven from the main haulage roadway 2 towards the cut-through roadway 7. Before driving, the coal seams in the conveyor roadways 4 and the return air roadways 3 of the second working face and the third working face have been pressure-relieved by hydraulic fracturing and gas pre-extraction has been carried out, which can provide a relatively safe environment for the driving of the conveyor roadways 4 and the return air roadways 3 of the second working face and the third working face; during the driving of the conveyor roadways 4 and the return air roadways 3 of the second working face and the third working face, the newly generated gas at the heading face will flow from the hydraulic fracturing boreholes 10 and their fracturing cracks in the conveyor roadways 4 of the un-driven second working face and the third working face, and the hydraulic fracturing boreholes 10 and their fracturing cracks in the return air roadways 3 into the cut-through roadway 7, and then through the first working face cut 5 and the return air roadway 3, and flows out to the return airway 1.

[0054] S6: As Figure 5 As shown in the figure, at the positions corresponding to the sectional coal pillars 11 between the first working face and the second working face, between the second working face and the third working face, and between the third working face and the fourth working face, the second sealing wall 9 is constructed in the cut-through roadway 7 to form the second working face cut 5 and the third working face cut 5.

[0055] Disconnect the connection between the return air roadways 3 of the second working face and the third working face and the main haulage roadway 2, and drive the return air roadways 3 of the second working face and the third working face in the reverse direction to connect them with the return airway 1.

[0056] After that, the conveyor roadways 4 and the return air roadways 3 of the second working face, the third working face and the fourth working face are sealed by the first sealing wall 8, and the connections between the conveyor roadways 4 of the second working face, the third working face and the fourth working face and the main haulage roadway 2, and the return air roadways 3 and the return airway 1 are respectively disconnected, and the first working face is ready for mining.

[0057] The main haulage roadway 2 in the above-mentioned First Embodiment and Second Embodiment may also be a haulage rise, and the corresponding return airway 1 is a return rise. The coal dust generated by tunneling at the heading face and the newly generated gas at the heading face have the same flow direction, and part of the coal dust will remain in the directional main borehole 6a, the directional branch borehole 6b, the hydraulic fracturing borehole 10 and the fracture cracks, so that the coal dust at the heading face can be reduced and the working environment of the workers can be optimized.

[0058] The present invention is not limited to the above-mentioned optimal implementation manner. Any person can obtain other various forms of methods under the inspiration of the present invention. However, any technical solution that is the same as or similar to the present application falls within the protection scope of the present invention.

Claims

1. A rapid tunneling method for gas-bearing coal seams based on hydraulic fracturing pressure relief, characterized in that, It includes the following steps: S1: Construct a directional main borehole in the transport gateway along the axial direction of the transport crossheading from the main haulage roadway, and construct a directional main borehole in the return airway gateway along the axial direction of the return crossheading from the return airway main roadway; Construct several directional branch boreholes from the directional main borehole to the coal mining area of the first working face; Use the directional branch boreholes to perform hydraulic fracturing and pressure relief on the coal seam in the coal mining area of the first working face, so that the fracture cracks formed by hydraulic fracturing communicate with each other; Use the directional main borehole to perform hydraulic fracturing and pressure relief on the coal seam in the transport crossheading and the return airway gateway. S2: Drive the transport crossheading from the main haulage roadway, then drive the cutting roadway from the transport crossheading towards the return airway gateway, and then drive the return airway gateway from the cutting roadway towards the return airway main roadway; During the driving process, let the air flow in through the transport crossheading and flow out through the return airway gateway. S3: Drive the roadway of the next working face according to steps S1 - S2.

2. The rapid tunneling method for a gas-bearing coal seam roadway based on hydraulic fracturing pressure relief according to claim 1, wherein In step S1, the directional branch boreholes constructed from the transport crossheading and the return airway gateway intersect in the coal mining area of the first working face.

3. The rapid tunneling method for a gas-bearing coal roadway based on hydraulic fracturing pressure relief according to claim 1, wherein In step S2, before driving, let the air flow in through the transport crossheading and flow out through the return airway gateway to pre - extract the gas of the first working face.

4. The rapid tunneling method for a gas-bearing coal seam roadway based on hydraulic fracturing pressure relief according to any one of claims 1 - 3, characterized in that, In step S3, the next working face is the second working face adjacent to the first working face. A sectional coal pillar is left between the second working face and the first working face. Drive the roadway of the second working face quickly according to steps S1 - S2; Then continue to leave a sectional coal pillar between the second working face and the previous working face, and drive the roadway of the subsequent working face quickly according to steps S1 - S2.

5. The rapid tunneling method for a gas-bearing coal seam roadway based on hydraulic fracturing pressure relief according to claim 1, characterized in that In step S3, the next working face is the N working face that is separated from the first working face by a plurality of working faces.

6. The rapid driving method for a gas-bearing coal seam roadway based on hydraulic fracturing pressure relief according to claim 5, characterized in that For several spaced - apart working faces, it further includes: S4: From the N working face cutting roadway, construct hydraulic fracturing boreholes in the cutting roadway connecting roadway towards the first working face cutting roadway, and relieve the pressure of the coal seam in the cutting roadway connecting roadway through hydraulic fracturing; then drive the cutting roadway connecting roadway in the same direction; S5: Construct hydraulic fracturing boreholes along the axial direction of the transport crossheading in the transport crossheadings of several spaced - apart working faces from the main haulage roadway, and construct hydraulic fracturing boreholes along the axial direction of the return airway gateway in the return airway gateways of several spaced - apart working faces from the main haulage roadway. Perform pressure relief on the coal seam in the return airway gateways and transport crossheadings of several spaced - apart working faces through hydraulic fracturing; Then start driving the return airway gateways and transport crossheadings of several spaced - apart working faces from the main haulage roadway.

7. The rapid tunneling method for a gas-bearing coal seam roadway based on hydraulic fracturing pressure relief according to claim 6, wherein In step S4, seal the first working face haulage gateway and the N return air gateway of the working face, so that the air flow direction is from the N haulage gateway of the working face and the crosscut, through the crosscut connecting roadway, to reach the first working face crosscut and the return air gateway.

8. The rapid tunneling method for a gas-bearing coal seam roadway based on hydraulic fracturing pressure relief according to claim 7, characterized in that, In step S5, seal the N face conveyor gate road, so that the air flow direction is from the return air gate road and the conveyor gate road of several spaced faces, through the cut-through roadway, to the first face cut-through and the return air gate road.

9. The rapid tunneling method for a gas-bearing coal seam roadway based on hydraulic fracturing pressure relief according to any one of claims 6-8, characterized in that, It further includes S6: Construct a sealing wall in the cutting roadway connection lane to form the cutting roadways of several spaced - apart working faces, disconnect the connection between the return airway gateways of several spaced - apart working faces and the main haulage roadway, and drive in the reverse direction to connect them with the return airway main roadway.

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