Rapid plugging device and method for underground roadway water outlet

Abstract

The rapid plugging device comprises a double-layer inflation water plugging balloon, the balloon is in a pear shape after being inflated, the outer layer of the double-layer inflation water plugging balloon is a hard rubber balloon outer sleeve, the inner layer of the double-layer inflation water plugging balloon is a soft rubber balloon inner container, and the balloon inner container is used for inflation expansion; the outer diameter of the bottom of the double-layer inflation water plugging balloon is 10-20 cm larger than the diameter of the section of the After water is discharged from a roadway driving working face or a water inrush symptom exists, the balloons are rapidly inflated to expand so as to seal a roadway, water pressure is resisted by utilizing friction resistance between friction rods on the surfaces of the balloons and the wall of the roadway, and the balloons are arranged in groups along the withdrawing direction of the roadway so as to provide buffer time for safe evacuation of personnel. The device is simple in structure, convenient to carry, convenient to use, capable of rapidly achieving the sealing effect and large in deformable space, only needs inflation operation, and is suitable for different sections and emergency situations under the cooperation of the surface friction rods.

Description

Technical Field

[0001] The present invention belongs to the technical field of underground roadway water treatment methods, and particularly relates to a rapid plugging device for underground roadway water inflow; it also relates to a rapid plugging method for underground roadway water inflow. Background Art

[0002] During the tunneling process of mine roadways, there is a threat of water inrush from the confined aquifer at the floor. When water suddenly gushes out in front of the working face or from the advanced exploration borehole during the tunneling process of the roadway, and there is a risk of water inrush due to high water pressure and large water discharge, it is necessary to quickly take measures to ensure the safe evacuation of operating personnel. For the water inrush from the high-confined floor aquifer, due to the high water pressure and rapid water inrush process, it is difficult to complete engineering measures such as waterproof bulkheads in a short time. Under the condition that there may be water inrush at any time, the construction of the water plugging project is also very dangerous and the risk is difficult to control.

[0003] In the past, after signs of water inrush were found underground, it was required that personnel take possible measures and then immediately evacuate the affected area. However, the measures that can be taken on site are limited, and there is a lack of rapid water stopping methods and devices, which makes the roadway or mine face the risk of being flooded.

[0004] Current water plugging airbag equipment is mostly for circular water outlet channels such as pipelines, and is mainly used for temporary water plugging in municipal pipelines, etc.

[0005] Publication No. CN110107353B discloses a water plugging device that uses the inflation and expansion of an airbag in cooperation with anchor nets and anchor bolts for fixing and installation. This device needs to fasten the four corners through anchor bolts, and the cross-sectional shape is suitable for rectangular roadways. Since this water plugging device requires construction of drill holes, laying of anchor nets, and installation of anchor bolts, and needs to be constructed at the four fixed corner positions, it requires multiple people to cooperate in construction and the operation time is also relatively long. In the case of a threat of water inrush, there is a greater risk in completing the construction. In addition, this device is more suitable for rectangular roadways. For arched roadways, horseshoe-shaped roadways, semi-circular roadways, etc., it is difficult for the corner positions to fit well with the roadway wall and it is difficult to seal tightly. Moreover, this device has more parts and a relatively complex structure. Summary of the Invention

[0006] The object of the present invention is to provide a rapid plugging device for underground roadway water inflow, which solves the problems of complex structure and difficult tight sealing of existing water plugging devices.

[0007] The object of the present invention also lies in providing a rapid plugging method for underground roadway water inflow, which solves the problem of relatively large construction risk.

[0008] The technical solution adopted by the present invention is as follows: a rapid water-blocking device for underground roadway water inflow, including a double-layer inflatable water-blocking balloon. After inflation, the balloon is in a pear shape. The outer layer of the double-layer inflatable water-blocking balloon is a hard rubber balloon outer cover, and the inner layer is a soft rubber balloon inner bladder. The balloon inner bladder is used for inflation and expansion. Steel cord is added to the balloon outer cover. The outer diameter of the bottom of the double-layer inflatable water-blocking balloon is 10 - 20 cm larger than the diameter of the roadway section, so as to ensure full contact with the roadway wall and have sufficient friction force.

[0009] The characteristics of the present invention also lie in that On the surface of the upper 2 / 3 section from the bottom of the balloon outer cover, rubber friction rods are arranged in a staggered manner. The rubber friction rods are in the shape of a mushroom, with a spherical top and a columnar shape with a gradually decreasing outer diameter at the rear.

[0010] One end of the rubber friction rod protruding outward is spherical, with a particle diameter of φ3.5 - 4.5 cm, and the end connected to the balloon outer cover is a variable-diameter columnar shape with a diameter of φ2 - 3 cm. The rubber friction rods include two types: long branches and short branches, which are arranged in a three-flower pattern and are staggered on the outer surface of the balloon. The length of the long-branch rubber friction rod is 9 - 11 cm, and the length of the short-branch rubber friction rod is 4 - 6 cm. The long and short branches are arranged alternately in rows.

[0011] A balloon mouth tube is installed at the head of the balloon. A valve core is installed inside the balloon mouth tube, and a pressure gauge and a pressure alarm are installed at the bottom of the tube.

[0012] The second technical solution adopted by the present invention is as follows: a rapid water-blocking method for underground roadway water inflow. Double-layer inflatable water-blocking balloons of different sizes are made of rubber. After the balloons are made, tetrahydrothiophene warning agent is filled. According to the mine design data, the cross-sectional shape and size of the driving roadway are mastered, and then double-layer inflatable water-blocking balloons of corresponding sizes are selected. When there is a risk of water inrush, the double-layer inflatable water-blocking balloons are taken out, inflated in sequence and laid at the driving face position to form a water-blocking balloon group to block water. Specifically as follows: Step 1: Make double-layer inflatable water-blocking balloons of different sizes with rubber. Step 2: According to the hydrogeological borehole data, calculate the maximum water pressure value of the floor confined aquifer borne at the driving face position. Step 3: Select a balloon with an outer diameter of the bottom 10 - 20 cm larger than the diameter of the roadway section. Step 4: Place the double-layer inflatable water-blocking balloon near the driving face. The double-layer inflatable water-blocking balloon moves forward continuously with the driving progress of the working face. When driving a roadway along the coal seam or rock stratum, when water inflow or a risk of water inrush occurs at the driving face, take out the double-layer inflatable water-blocking balloon, unfold it and lay it at the driving face position. Step 5: According to the driving direction of the roadway, orient the bottom of the double-layer inflatable water-blocking balloon towards the roadway to be driven and the head towards the system roadway direction. Use an explosion-proof air pump to inflate the double-layer inflatable water-blocking balloon, while adjusting the balloon position so that the line connecting the balloon head and bottom is parallel to the center line of the tunnel to avoid skewness. Use a pressure gauge to observe the air pressure inside the balloon to ensure that the maximum pressure-bearing capacity of the balloon is not exceeded during inflation. After the first balloon is inflated, inflate the second balloon at a distance of 0.8 to 1.2 m behind it, and arrange 3 to 4 balloons in sequence to form a water-blocking balloon group. Step 6: After the water-blocking balloon group is arranged, quickly evacuate to the safe area of ​​the system tunnel or ascend to the surface; Step 7: Use the underground video monitoring system to check whether there is water inrush in the underground tunnel. If there is no water inrush, arrange professional water prevention and control technicians to go down the well to judge whether the balloon is broken by the smell of the warning agent. When it is confirmed that the balloon is in good condition and no water is leaking out, dig a groove in the rock wall in the relatively intact area of ​​the surrounding rock behind the double-layer water-blocking balloon, and then use reinforced mud concrete to build a waterproof and airtight wall to ensure that the waterproof and airtight wall can withstand the water pressure of the bottom plate aquifer. Install a pressure gauge on the waterproof and airtight wall to observe the pressure inside the wall; Step 8: In the safety chamber, use a long-distance directional drill to construct a long-distance exploratory borehole from the side of the tunnel to the water outlet point. After finding out the water outlet channel and the water source, use the long-distance directional drill to construct multiple groups of boreholes at the water outlet point, and then grout to seal the water outlet channel; Step 9: After the water outlet channel is sealed and no water risk is verified, holes are drilled in the waterproof and airtight wall to observe the warning agent leakage. When no warning agent leakage is confirmed, the waterproof and airtight wall is removed; then, starting from the outermost double-layer inflatable water-blocking balloon, slowly open the valve core to deflate. If there is water accumulation inside, slowly release it, and open each double-layer inflatable water-blocking balloon one by one to drain the water accumulated in front of the excavation work surface; If there is a lot of water in front of the excavation work, a long-distance directional drilling rig will be used to penetrate the waterproof and airtight wall, and then the double-layer inflatable water-blocking balloons will be drilled through one by one to drain the water in front of the excavation work; After the accumulated water in front of the excavation working face is completely released and discharged to the ground, the waterproof and sealed wall is dismantled, the damaged double-layer inflatable water-blocking balloon is taken out, and the excavation working face resumes normal excavation work.

[0013] Step 1 The specific steps are as follows: Step 1.1: Use rubber material to make a double-layer inflatable water blocking balloon. After inflation, the balloon is pear-shaped, with a large bottom and a small head. The balloon has a double-layer structure, the inner layer is the balloon liner, and the outer layer is the balloon jacket with steel cord added. Step 1.2: In the area from the bottom of the balloon upward to 2 / 3 of the balloon height, rubber friction rods are arranged alternately; the rubber friction rods are mushroom-shaped, and are made by hot melting simultaneously with the balloon jacket, forming an integral structure with the balloon jacket; the rubber friction rods are composed of two types: long and short; Step 1.3: Install a drawstring tube at the head of the balloon, install a valve core inside the tube, and install a pressure gauge and a pressure alarm at the bottom of the drawstring tube; when the internal pressure of the balloon rises above the set bearing capacity, the pressure alarm emits an alarm sound, indicating that the balloon may burst and it is necessary to evacuate as soon as possible; Step 1.4: After the balloon is manufactured, fill it with tetrahydrothiophene warning agent.

[0014] The beneficial effects of the present invention are as follows: Compared with the prior art, the present invention has the following technical effects: (1) Made of a rubber balloon, it can be folded and compressed, with a small volume and convenient to carry. It can be moved at any time along with the excavation of the working face and placed near the working site, occupying a small space.

[0015] (2) The usage method is simple. It can be quickly inflated by an air pump, with a fast onset and high efficiency.

[0016] (3) The cost of the water plugging process is low. There is no need for special transportation and installation, no need for professional technical personnel to operate, and no other auxiliary materials are required.

[0017] (4) Rubber friction bars are designed outside the balloon, which can not only increase the friction force to prevent the balloon from being washed away by high water pressure, but also increase the contact surface with the roadway wall and improve the water plugging tightness.

[0018] (5) The shape of the pear-shaped balloon has a large deformation range, which is suitable not only for arched roadways but also for roadways with various cross-sections such as rectangular and horseshoe-shaped. The rubber friction bars on the outer surface of the balloon can fit well with the roadway wall, making up for the deficiency that the cylindrical cross-section shape does not fit tightly with the four corners of the rectangle and is thus prone to water leakage. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the double-layer inflatable water plugging balloon of the present invention.

[0020] Figure 2 is a diagram of the structure and arrangement of the rubber friction bars on the surface of the double-layer inflatable water plugging balloon of the present invention.

[0021] Figure 3 is a sectional view of the water plugging structure of the water isolation balloon group of the present invention.

[0022] Figure 4 is a horizontal plan view of the water plugging structure of the water isolation balloon group and the directional drilling grouting plugging structure of the present invention.

[0023] Figure 5 is Figure 4 a partial enlarged view of

[0024] Among them, 1 - drawstring tube; 2 - balloon outer sleeve; 3 - balloon inner bladder; 4 - rubber friction rod; 5 - double - layer inflatable water - blocking balloon; 6 - coal seam; 7 - water - resistant layer; 8 - collapse column; 9 - confined aquifer; 10 - fault; 11 - driving face; 12 - borehole; 13 - roadway to be driven; 14 - safety chamber; 15 - waterproof airtight wall; 16 - system roadway; 17 - pressure alarm; 18 - pressure gauge; 19 - valve core; 20 - hydrogeological borehole; 21 - long - distance directional drill; 22 - long - distance exploration borehole. Detailed implementation manners

[0025] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Embodiment 1 The device for quickly plugging water leakage in an underground roadway includes a double - layer inflatable water - blocking balloon 5. After inflation, the balloon is in a pear shape. The outer layer of the double - layer inflatable water - blocking balloon is a hard rubber balloon outer sleeve 2, and the inner layer is a soft rubber balloon inner bladder 3. The balloon inner bladder 3 is used for inflation and expansion. The outer diameter of the bottom of the double - layer inflatable water - blocking balloon 5 is 10 - 20 cm larger than the diameter of the roadway section.

[0027] On the surface of the upper 2 / 3 section from the bottom of the balloon outer sleeve 2, rubber friction rods 4 are arranged in a staggered manner. The rubber friction rods 4 are in the shape of a mushroom, with a spherical top and a columnar shape with a gradually decreasing outer diameter at the rear.

[0028] Embodiment 2 The device for quickly plugging water leakage in an underground roadway includes a double - layer inflatable water - blocking balloon 5. After inflation, the balloon is in a pear shape. The outer layer of the double - layer inflatable water - blocking balloon is a hard rubber balloon outer sleeve 2, and the inner layer is a soft rubber balloon inner bladder 3. The balloon inner bladder 3 is used for inflation and expansion. The outer diameter of the bottom of the double - layer inflatable water - blocking balloon 5 is 10 - 20 cm larger than the diameter of the roadway section.

[0029] On the surface of the upper 2 / 3 section from the bottom of the balloon outer sleeve 2, rubber friction rods 4 are arranged in a staggered manner. The rubber friction rods 4 are in the shape of a mushroom, with a spherical top and a columnar shape with a gradually decreasing outer diameter at the rear.

[0030] One end of the rubber friction rod 4 extending outwards is spherical, with a particle size of φ3.5 - 4.5 cm, and the end connected to the balloon outer sleeve 2 is a stepped column with a diameter of φ2 - 3 cm; the rubber friction rod 4 includes two types, long branches and short branches, arranged in a three-flower pattern and staggered on the outer surface of the balloon; the length of the long-branch rubber friction rod is 9 - 11 cm; the length of the short-branch rubber friction rod is 4 - 6 cm; the long and short branches are arranged alternately in rows. Under the extrusion of the internal air pressure and the external roadway wall, the rubber friction rods are compacted against each other, playing a role in water isolation.

[0031] Example 3 On the basis of Example 2, a balloon mouth tube is installed at the balloon head, a valve core 19 is installed inside the balloon mouth tube, and a pressure gauge 18 and a pressure alarm 17 are installed at the bottom of the tube. When the internal pressure of the balloon rises above the set bearing capacity, the pressure alarm emits an alarm sound, indicating that the balloon has a risk of rupture and needs to be evacuated as soon as possible.

[0032] A rechargeable explosion-proof inflator that can be used underground is equipped with the balloon, and the balloon is quickly inflated using the inflator.

[0033] After eliminating the threat of water inrush by other means, the balloon can be deflated through the valve core to retract the balloon.

[0034] Example 4 On the basis of Example 3, The principle of using the pear-shaped double-layer balloon to plug water in the roadway in the present invention is as follows: After the pear-shaped balloon is inflated, its volume expands rapidly and contacts the roadway wall. The pear-shaped structure makes the bottom of the balloon large and the head small. Inflation causes the bottom to expand and get stuck in the roadway. Under the extrusion of the internal air pressure and the surrounding rock of the roadway, a large frictional force is generated. With the specially designed rubber friction rods, it can be firmly stuck in the roadway to resist the water pressure generated by the water inflow at the tunneling position. After the rubber friction rods are compacted against each other, they can play a good role in water isolation and can be closely attached to the roadway wall.

[0035] Multiple balloons are arranged in groups in the roadway to further improve the water pressure resistance and tightness.

[0036] According to the observation data of the mine hydrogeological boreholes, calculate the maximum water pressure value of the floor aquifer borne by the tunneling area of the roadway. According to the mine design data, master the cross-sectional dimensions of the tunneling roadway, select balloons of corresponding sizes, and place them near the tunneling face for standby at any time.

[0037] Example 5 The specific operation steps of the method for quickly plugging water inrush in the underground roadway of the present invention are as follows: Step 1: Use rubber to make double-layer inflatable water-blocking balloons of different sizes; after the balloons are made, a small amount of tetrahydrothiophene (THT) warning agent is filled. Once the balloon ruptures, a strongly odorous substance is emitted as a warning.

[0038] Step 2: Calculate the maximum water pressure value of the bottom plate confined aquifer 9 at the excavation working face 11 according to the hydrological drilling data; Step 3: Select a balloon with a bottom outer diameter that is 10 to 20 cm larger than the tunnel cross-sectional diameter; Step 4: Place the double-layer inflatable water-blocking balloon near the excavation working face 11, and the double-layer inflatable water-blocking balloon will continue to move forward as the excavation progresses; when excavating a tunnel along the coal seam 6 or rock layer, when there is a risk of water inrush, take out the double-layer inflatable water-blocking balloon, open it, and lay it at the excavation working face; Step 5: According to the tunnel excavation direction, the bottom of the double-layer inflatable water-blocking balloon is directed toward the tunnel to be excavated 13, and the head is directed toward the system tunnel 16; Use an explosion-proof air pump to inflate the double-layer inflatable water-blocking balloon, while adjusting the balloon position so that the line connecting the balloon head and the bottom is parallel to the center line of the tunnel to avoid skewing. Use a pressure gauge 18 to observe the internal air pressure of the balloon to ensure that the maximum pressure-bearing capacity of the balloon is not exceeded during inflation. After the first balloon is inflated, inflate the second balloon at a distance of 0.8 to 1.2 m behind it, and arrange 3 to 4 balloons in sequence to form a water-blocking balloon group. Step 6: After the water-blocking balloon group is arranged, quickly evacuate to the safe area of ​​system tunnel 16 or ascend to the ground; Step 7: Use the underground video monitoring system to check whether there is water inrush in the underground tunnel. If there is no water inrush accident, arrange professional water prevention and control technicians to go down the well to judge whether the balloon is broken by the smell of the warning agent. When it is determined that the balloon is in good condition and no water is leaking out, dig a groove in the rock wall in the relatively intact area of ​​the surrounding rock behind the double-layer water-blocking balloon, and then use reinforced mud concrete to construct a waterproof and sealed wall 15 to ensure that the waterproof and sealed wall 15 can withstand the water pressure of the bottom plate aquifer. Install a pressure gauge on the waterproof and sealed wall to observe the pressure inside the wall; Step 8: In the safety chamber 14, a long-distance directional drilling machine 21 is used to construct a long-distance exploration borehole 22 from the side of the tunnel to the water outlet point. After the water outlet channel and the water source are found, a plurality of groups of boreholes are constructed at the water outlet point by using the long-distance directional drilling machine 21, and then the water outlet channel is sealed by grouting; Step 9: After the water outlet channel is sealed and no water risk is verified, a hole is drilled on the waterproof and airtight wall 15 to observe the warning agent leakage. When it is confirmed that no warning agent has escaped, the waterproof and airtight wall 15 is removed; then, starting from the outermost double-layer inflatable water-blocking balloon, the valve core 19 is slowly opened to deflate. If there is water accumulation inside, it is slowly released, and each double-layer inflatable water-blocking balloon is opened one by one to drain the water accumulated in front of the excavation work surface; If there is a large amount of accumulated water in front of the tunneling working face, use a long-distance directional drilling rig 21 to penetrate the waterproof airtight wall 15, and then drill through the double-layer inflatable water blocking balloons one by one to drain the accumulated water in front of the tunneling working face; After the accumulated water in front of the tunneling working face is completely released and drained to the ground, remove the waterproof airtight wall, take out the damaged double-layer inflatable water blocking balloons, and the tunneling working face resumes normal tunneling work.

[0039] Example 6 As Figures 1-5 shown, the method for quickly plugging water leakage in underground roadways of the present invention is specifically operated as follows: (1) Use rubber material to make a double-layer inflatable water blocking balloon 5. After the balloon is inflated, it is in a pear shape, with a large bottom and a small head. The balloon is a double-layer structure. The inner layer is the balloon inner bladder 3, which is relatively soft in texture and is used for inflation and expansion. The outer layer is the balloon outer sleeve 2, which is relatively hard in texture and is added with steel cord to maintain the shape, resist friction and deformation, and bear the water pressure, and has wear resistance, puncture resistance and cutting resistance.

[0040] (2) The outer diameter of the balloon bottom (excluding the rubber friction rod) is about 10-20 cm larger than the diameter of the roadway section, which is convenient for the balloon bottom to be stuck in the roadway after inflation.

[0041] (3) Rubber friction rods 4 are arranged staggered in the area about 2 / 3 of the balloon height upward from the balloon bottom. The rubber friction rod is in a mushroom shape and is also made of rubber material. It is synchronously hot-melted with the balloon outer sleeve 2 and becomes an integral structure with the balloon outer sleeve 2. The rubber friction rod is composed of two types: long branches and short branches.

[0042] (4) The outer diameter of the end of the rubber friction rod extending outward is about φ4 cm, and it gradually decreases inward. The diameter at the connection with the balloon outer sleeve 2 is φ2-3 cm. The size of the rubber friction rod can be appropriately adjusted according to the overall size of the balloon. The rubber friction rods are arranged in a three-flower pattern on the balloon outer sleeve 2 and are staggered on the outer surface of the balloon. The length of the long-branch rubber friction rod is about 10 cm, and the length of the short-branch rubber friction rod is about 5 cm. The long and short branches are arranged alternately. Under the extrusion of the internal air pressure and the external roadway wall, the rubber friction rods are squeezed tightly with each other to play a role in water isolation.

[0043] (5) Install a drawstring tube 1 at the head of the balloon. Install a valve core 19 inside the tube. Install a pressure gauge 18 and a pressure alarm 17 at the bottom of the drawstring tube 1. When the internal pressure of the balloon rises and exceeds the set bearing capacity, the pressure alarm emits an alarm sound, indicating that the balloon may burst and it is necessary to evacuate as soon as possible.

[0044] (6) After the balloon is made, fill it with a small amount of tetrahydrothiophene (THT) warning agent. Once the balloon bursts, the substance that emits a strong smell is used as a warning.

[0045] (7) Design balloons with different sizes and pressure-bearing capacities to facilitate use in different areas. The minimum pressure-bearing capacity of the balloon shall not be less than 5 MPa.

[0046] (8) Equip the balloon with a rechargeable explosion-proof inflator pump for downhole use, and use the inflator pump to quickly inflate the double-layer inflatable water plugging balloon 5.

[0047] (9) According to the hydrogeological borehole data, calculate the maximum water pressure value of the floor confined aquifer 9 borne by the heading face 11. The water pressure value is the height difference between the water level in the hydrogeological borehole 20 and the floor of the heading face 11, and then divided by 100, which is the water pressure value, with the unit of MPa; (10) According to the mine design data, master the cross-sectional shape and size of the heading roadway, and then select a double-layer inflatable water plugging balloon 5 with corresponding size and compressive capacity. The outer diameter of the bottom of the selected balloon (excluding the rubber friction rod) shall be about 10-20 cm larger than the diameter of the roadway cross-section to facilitate the balloon to be stuck in the roadway after the bottom is inflated.

[0048] (11) Place the double-layer inflatable water plugging balloon 5 near the heading face 11, and place the explosion-proof inflator pump together with the balloon, and move forward continuously with the progress of the working face.

[0049] (12) Drive the roadway along the coal seam 6 or rock stratum. When water gushes out from the heading face 11 due to the construction of advanced exploration and water drainage boreholes 12 or the exposure of water-containing (conductive) structures such as collapse columns 8 and faults 10 during the heading face 11 construction, and there is a risk of water inrush, take out the double-layer inflatable water plugging balloon 5, open it and lay it at the position of the heading face 11; the collapse column 8 is located in the aquitard 7.

[0050] (13) According to the roadway driving direction, orient the bottom of the double-layer inflatable water plugging balloon 5 towards the roadway 13 to be driven and the head towards the system roadway direction 16.

[0051] (14) While inflating the double-layer inflatable water plugging balloon 5 with the explosion-proof inflator pump, adjust the position of the balloon to make the connection line between the head and the bottom of the balloon parallel to the roadway center line to avoid skew. Observe the internal air pressure of the balloon through the pressure gauge 18 to ensure that the air pressure does not exceed the maximum pressure-bearing capacity of the balloon during inflation.

[0052] (15) After the first balloon is inflated, inflate the second balloon at a position about 1 m behind it, and arrange 3-4 in sequence to form a water isolation balloon group.

[0053] (16) After the water isolation balloon group is arranged, quickly evacuate to the safe area of the system roadway 16 or ascend to the ground.

[0054] (17) First, use the underground video monitoring system to check whether there is any water inrush in the underground tunnels. If no water inrush accident occurs, arrange for professional water prevention and control technicians to go down the well to determine whether the balloon is ruptured by the smell of the warning agent. After confirming that the balloon is in good condition and no water is leaking, dig a groove in the rock wall in the relatively intact area of ​​the surrounding rock behind the water-blocking balloon, and then use reinforced concrete to construct a waterproof closed wall 15 to ensure that it can withstand the water pressure of the bottom plate aquifer. Install a pressure gauge on the closed wall to observe the pressure inside the wall.

[0055] (18) In the safety chamber 14, a long-distance directional drilling rig 21 is used to construct a long-distance exploratory borehole 22 from the side of the tunnel to the water outlet point. After the water outlet channel and the water source are identified, the long-distance directional drilling rig 21 is used to construct multiple groups of boreholes at the water outlet point, and then grouting is performed to seal the water outlet channel.

[0056] (19) After the water outlet channel is sealed and it is verified that there is no risk of water leakage, a hole is drilled in the waterproof and sealed wall 15 to observe the leakage of the warning agent. After it is confirmed that there is no leakage of the warning agent, the waterproof and sealed wall 15 is dismantled.

[0057] (20) Starting from the outermost balloon, slowly open the valve core 19 to deflate. If there is water inside, slowly release it. Open each double-layer inflatable water-blocking balloon 5 one by one to drain the water in front of the excavation working face 11.

[0058] (21) The double-layer inflatable water blocking balloon 5 is folded and recovered, and after being inflated on the ground, an integrity test is performed. If there is no obvious damage, a small amount of tetrahydrothiophene (THT) warning agent is refilled, and the balloon is folded and continued to be used.

[0059] (22) If there is a concern that there is a lot of water accumulation in front of the excavation working face 11 and the water pressure is high, and there is a risk of personnel approaching and draining the accumulated water by deflating the double-layer inflatable water-blocking balloon 5, then after the water outlet channel is closed and it is verified that there is no risk of water leakage, a long-distance directional drilling rig 21 is used to penetrate the waterproof closed wall 15, and then the double-layer inflatable water-blocking balloons 5 are drilled through one by one, so that the water in front of the excavation working face 11 can be drained to ensure the safety of personnel.

[0060] (23) After the accumulated water in front of the excavation working face 11 is completely released and discharged to the ground, the waterproof sealing wall 15 is dismantled, the damaged double-layer inflatable water-blocking balloon 5 is taken out, and the excavation working face 11 resumes normal excavation work.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A rapid plugging device for underground roadway water inflow, characterized in that, It includes a double-layer inflatable water plugging balloon (5), which is pear-shaped after inflation. The inner layer of the double-layer inflatable water plugging balloon is a soft rubber balloon inner bladder (3) for inflating and expanding, and the outer layer is a hard rubber balloon outer jacket (2). Steel cord is added to the balloon outer jacket (2). The outer diameter of the bottom of the double-layer inflatable water plugging balloon (5) is 10 - 20 cm larger than the diameter of the roadway section.

2. The rapid plugging device for underground roadway water inflow according to claim 1, characterized in that On the surface of the upper 2 / 3 section from the bottom of the balloon outer jacket (2), rubber friction rods (4) are arranged in a staggered manner. The rubber friction rods (4) are mushroom-shaped, with a spherical top and a columnar shape with a gradually decreasing outer diameter at the rear.

3. The rapid water plugging device for underground roadway water outlet according to claim 2, wherein, One end of the rubber friction rod (4) extending outwards is spherical, with a particle diameter of φ3.5 - 4.5 cm, and the end connected to the balloon outer jacket (2) is a variable-diameter columnar shape with a diameter of φ2 - 3 cm. The rubber friction rods (4) include two types: long branches and short branches, which are arranged in a three-flower pattern and staggered on the outer surface of the balloon. The length of the long-branch rubber friction rods is 9 - 11 cm; the length of the short-branch rubber friction rods is 4 - 6 cm; the long and short branches are arranged alternately in rows.

4. The rapid water plugging device for underground roadways according to claim 2, characterized in that, A balloon mouth-binding tube (1) is installed at the head of the double-layer inflatable water plugging balloon. A valve core (19) is installed inside the mouth-binding tube (1), and a pressure gauge (18) and a pressure alarm (17) are installed at the bottom of the tube.

5. A rapid plugging method for water gushing in underground roadways, characterized in that, Double-layer inflatable water plugging balloons of different sizes are made of rubber. After the balloons are made, tetrahydrothiophene warning agents are filled. According to the mine design data, the cross-sectional shape and size of the driving roadway are mastered, and then double-layer inflatable water plugging balloons of corresponding sizes are selected. When there is a risk of water inrush, the double-layer inflatable water plugging balloons are taken out, inflated in sequence, and laid at the position of the driving face to form a water-blocking balloon group to block water.

6. The rapid plugging method for underground roadway water inrush according to claim 5, characterized in that, The specific operation steps are as follows: Step 1: Make double-layer inflatable water plugging balloons of different sizes with rubber. Step 2: According to the hydrogeological borehole data, calculate the maximum water pressure value of the floor confined aquifer (9) borne at the position of the driving face (11). Step 3: Select a balloon with an outer diameter at the bottom 10 - 20 cm larger than the diameter of the roadway section. Step 4: Place the double-layer inflatable water plugging balloon near the driving face (11). The double-layer inflatable water plugging balloon moves forward continuously with the progress of the driving face. When driving a roadway along the coal seam (6) or rock stratum, when water appears or there is a risk of water inrush at the driving face, take out the double-layer inflatable water plugging balloon, open it, and lay it at the position of the driving face. Step 5: According to the driving direction of the roadway, orient the bottom of the double-layer inflatable water plugging balloon towards the roadway to be driven (13) and the head towards the system roadway (16). Use an explosion-proof air pump to inflate the double-layer inflatable water plugging balloon. While adjusting the position of the balloon, make the connection line between the head and the bottom of the balloon parallel to the roadway center line to avoid skew. Observe the internal air pressure of the balloon through the pressure gauge (18) to ensure that the air pressure does not exceed the maximum bearing capacity of the balloon during inflation. After the first balloon is inflated, inflate the second balloon at a position 0.8 - 1.2 m behind it. Arrange 3 - 4 balloons in sequence to form a water-blocking balloon group. Step 6: After the water-blocking balloon group is arranged, quickly evacuate to the safe area of the system roadway (16) or ascend to the ground. Step 7: Use the underground video monitoring system to check whether water inrush occurs in the underground tunnel. If no water inrush occurs, arrange for professional water prevention and control technicians to go down the well to judge whether the balloon is ruptured by the smell of the warning agent. When it is determined that the balloon is in good condition and no water is leaking out, cut a groove in the rock wall in the relatively intact area of ​​the surrounding rock behind the double-layer water-blocking balloon, and then use reinforced concrete to construct a waterproof and sealed wall (15) to ensure that the waterproof and sealed wall (15) can withstand the water pressure of the bottom plate aquifer. Install a pressure gauge on the waterproof and sealed wall to observe the pressure inside the wall; Step 8: In the safety chamber (14), a long-distance directional drilling machine (21) is used to construct a long-distance exploratory borehole (22) from the side of the tunnel to the water outlet point. After the water outlet channel and the water outlet source are identified, multiple groups of boreholes are constructed at the water outlet point using the long-distance directional drilling machine (21), and then grouting is performed to seal the water outlet channel; Step 9: After the water outlet channel is sealed and no water risk is verified, a hole is drilled on the waterproof sealed wall (15) to observe the warning agent leakage. When it is confirmed that no warning agent has escaped, the waterproof sealed wall (15) is removed; then, starting from the outermost double-layer inflatable water-blocking balloon, the valve core (19) is slowly opened to deflate. If there is water accumulation inside, it is slowly released. Each double-layer inflatable water-blocking balloon is opened one by one to drain the water accumulated in front of the excavation work surface; If there is a lot of water in front of the excavation work, a long-distance directional drilling machine (21) is used to penetrate the waterproof and airtight wall (15), and then the double-layer inflatable water-blocking balloons are drilled through one by one to drain the water in front of the excavation work; After the accumulated water in front of the excavation working face is completely released and discharged to the ground, the waterproof and sealed wall is dismantled, the damaged double-layer inflatable water-blocking balloon is taken out, and the excavation working face resumes normal excavation work.

7. The rapid plugging method for underground roadway water inrush according to claim 6, characterized in that, The minimum pressure bearing capacity of the double-layer inflatable water blocking balloon (5) is not less than 5 MPa.

8. The rapid plugging method for underground roadway water inrush according to claim 6, characterized in that, Step 1 The specific steps are as follows: Step 1.1: A double-layer inflatable water blocking balloon (5) is made of rubber material. After being inflated, the balloon is pear-shaped, with a large bottom and a small head. The balloon has a double-layer structure, the inner layer is the balloon liner (3); the outer layer is the balloon jacket (2) and a steel cord is added; Step 1.2: In the area from the bottom of the balloon upward to 2 / 3 of the balloon height, rubber friction rods (4) are arranged in a staggered manner; the rubber friction rods are mushroom-shaped, and are made by hot melting simultaneously with the balloon jacket (2), and are an integral structure with the balloon jacket (2); the rubber friction rods are composed of two types: long rods and short rods; Step 1.3: Install a constriction tube (1) at the head of the balloon, install a valve core (19) in the tube, and install a pressure gauge (18) and a pressure alarm (17) at the bottom of the constriction tube (1); when the pressure inside the balloon rises to exceed the set bearing capacity, the pressure alarm sounds an alarm, indicating that the balloon may rupture and it is necessary to evacuate as soon as possible; Step 1.4: After the balloon is made, fill it with tetrahydrothiophene warning agent.

Images