CN-121993092-A - Pulping grouting method and pulping grouting system

CN121993092ACN 121993092 ACN121993092 ACN 121993092ACN-121993092-A

Abstract

The embodiment of the invention discloses a grouting method and a grouting system, wherein the grouting method comprises the following steps of S1, calculating theoretical grouting amount according to the size of a target drilling hole, the size of a pumping pipe and the parameters of drilling hole sealing, S2, calculating actual grouting amount according to the theoretical grouting amount, S3, calculating the consumption of sealing material and the consumption of water according to the actual grouting amount, S4, mixing and stirring the sealing material and the water with the calculated consumption to form slurry, and S5, injecting the slurry into the target drilling hole until the injection amount reaches the actual grouting amount or the grouting pressure reaches the preset pressure. According to the grouting method and the grouting system, the consumption of the sealing material and the consumption of water are calculated through mixing, the prepared slurry is reasonable in proportion and accurate in quality, and when the prepared slurry is injected into the section to be sealed of the drilling hole by controlling the actual grouting amount or grouting pressure, the grouting sealing quality can be ensured, and the gas extraction effect is improved.

Inventors

HAO JINWEI
SHU LONGYONG
HAN XINTAO
REN ZEWANG
LI XIN
Di Pengju
YE JINJIAO
YANG WEIDONG

Assignees

煤炭科学技术研究院有限公司
山东力弘智能装备有限公司

Dates

Publication Date: 20260508
Application Date: 20251229

Claims (10)

1. A method of pulping and grouting comprising the steps of: s1, calculating theoretical grouting amount according to the size of a target drilling hole, the size of a pumping pipe and parameters of drilling hole sealing; s2, calculating actual grouting amount according to the theoretical grouting amount; s3, calculating the consumption of sealing materials and the consumption of water according to the actual grouting amount; s4, mixing and stirring the calculated consumption amount of the sealing material and the water to form slurry; And S5, injecting the slurry into the target drilling hole until the injection quantity reaches the actual injection quantity or the injection pressure reaches the preset pressure.
2. The grouting method according to claim 1, wherein in the step S1, according to the formula: V=pi { (D/2) 2 -(d/2) 2 }, calculating a theoretical grouting volume, wherein V is the theoretical grouting volume, D is the diameter of the target drilling hole, D is the diameter of the extraction pipe, and l is the length of a section to be sealed of the target drilling hole; according to the formula: M 1 = V ρ, where M 1 is the theoretical grouting amount and ρ is the slurry density.
3. The grouting method according to claim 2, wherein in the step S2, according to the formula: and calculating the actual grouting amount by M 2 =M 1 a, wherein M 2 is the actual grouting amount and a is a grouting coefficient.
4. A pulping and grouting method according to claim 3, wherein in the step S3, according to the formula: M= (M 2 x b)/(b+1), the consumption of the sealing material is calculated according to the formula: N=m/b, calculating the consumption of said water; Wherein M is the consumption of the sealing material, N is the consumption of the water, and b is the mass ratio of the sealing material to the water.
5. The method according to claim 1, wherein in step S4, the viscosity of the slurry is monitored in real time while stirring the sealing material and the water, and after the viscosity reaches a predetermined value, step S5 is started.
6. A pulping grouting system for carrying out the pulping grouting method according to any one of claims 1 to 5, comprising: A grouting device (100), wherein the grouting device (100) is used for measuring a preset amount of water, mixing and stirring the water and a sealing material, and the grouting device (100) is used for injecting a mixed solution of the water and the sealing material into a target drilling hole; -a weighing device (200), the weighing device (200) being adapted to measure the amount of the sealing material fed and to deliver the sealing material to the grouting device (100); -a control unit (300), the control unit (300) being adapted to calculate the consumption of both the sealing material and the water, the control unit (300) being electrically connected to both the weighing device (200) and the grouting device (100); The control unit (300) is configured to control the weighing device (200) to convey the sealing material to the grouting device (100) under the condition that the feeding amount of the sealing material reaches the calculated consumption amount; The control unit (300) controls the grouting device (100) to perform stirring action, the control unit (300) is configured to control the water to stop conveying to the grouting device (100) under the condition that the water reaches the calculated consumption, and the control unit (300) is configured to control the grouting device (100) to start grouting under the condition that the mixed liquid reaches the preset viscosity.
7. The grouting system as claimed in claim 6, wherein the grouting device (100) comprises: -a stirring assembly (110), the stirring assembly (110) being adapted to contain and stir the water and the sealing material; A water inlet assembly (120), the water inlet assembly (120) being in communication with the stirring assembly (110) for delivering the water to the stirring assembly (110); and the grouting assembly (130) is communicated with the stirring assembly (110) and is used for injecting the mixed liquid in the stirring assembly (110) into the target drilling hole.
8. The grouting system of claim 7, wherein the stirring assembly (110) comprises a stirring vessel (111); The grouting device (100) further comprises a viscosity sensor (140), wherein the viscosity sensor (140) is arranged in the stirring container (111) and is used for monitoring the viscosity of the mixed liquid in the stirring container (111); The grouting assembly (130) comprises a grouting pipeline (131) and a multi-parameter sensor (132), wherein the grouting pipeline (131) is used for being communicated with the target drilling hole, and the multi-parameter sensor (132) is arranged on the grouting pipeline (131) and used for monitoring the flow and the pressure of the mixed liquid in the grouting pipeline (131).
9. The grouting system of claim 6, wherein the weighing device (200) comprises: A stand (210); the weighing sensors (220) are arranged on the stand (210), and the weighing sensors (220) are distributed at intervals around a vertical axis; -a bin (230), said bin (230) being provided on a plurality of said load cells (220).
10. The grouting system of claim 9, wherein the weighing device (200) further comprises: -a conveying duct (240), the conveying duct (240) extending in a transversal direction and being located below the silo (230) and above the stirring assembly (110), the conveying duct (240) being in communication with both the silo (230) and the stirring assembly (110); the screw shaft (250) is positioned in the conveying pipeline (240), and two ends of the screw shaft (250) are respectively in running fit with two end parts of the conveying pipeline (240); the driving piece is in transmission connection with the screw shaft (250) so as to drive the screw shaft (250) to rotate around the axis of the screw shaft.

Description

Pulping grouting method and pulping grouting system Technical Field The invention relates to the technical field of gas extraction, in particular to a pulping grouting method and a pulping grouting system. Background Gas is a main disaster source threatening the safe production of coal mines and is also an important clean energy source. In order to effectively prevent and treat gas disasters and realize resource utilization, underground drilling extraction technology is commonly adopted in coal mines. In the technology, the grouting sealing quality of the drilling hole directly determines the air tightness and the negative pressure stability of the extraction system, and is a core link for influencing the gas extraction concentration and the efficiency. In the related art, the underground drilling grouting construction depends on a manual operation mode, namely, a simple stirring barrel and a grouting pump are manually used for preparing and pouring slurry. Obviously, the operation mode is implemented by means of experience of workers, the proportion of grouting materials to water and the grouting amount cannot be accurately and quantitatively controlled, the problems that the slurry is unreasonable to prepare, the grouting quality is difficult to control and the like are easy to occur, and finally uneven sealing quality of drilling holes is caused, so that the gas extraction effect is affected. Disclosure of Invention The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, in a first aspect, an embodiment of the present invention provides a grouting method, including the steps of S1 calculating a theoretical grouting amount according to parameters of a size of a target borehole, a size of a drainage pipe, and a hole sealing of the borehole, S2 calculating an actual grouting amount according to the theoretical grouting amount, S3 calculating an consumption amount of a sealing material and an consumption amount of water according to the actual grouting amount, S4 mixing and stirring the sealing material and the water calculated in the consumption amount to form a slurry, and S5 injecting the slurry into the target borehole until the injection amount reaches the actual grouting amount or the grouting pressure reaches a predetermined pressure. According to the grouting method, the consumption of the sealing material and the consumption of water are calculated according to the size of the target drilling hole, the size of the extraction pipe and the parameters of the drilling hole sealing, the sealing material and the water with the consumption calculated by mixing are reasonably proportioned and accurate in quality, and the quality of grouting sealing can be ensured and the gas extraction effect can be improved when the prepared slurry is injected into the section to be sealed of the drilling hole by controlling the actual grouting amount or grouting pressure. In some embodiments, in the step S1, a theoretical grouting volume is calculated according to the formula v=pi { (D/2) 2-(d/2)2 }, where V is the theoretical grouting volume, D is the diameter of the target borehole, D is the diameter of the extraction pipe, and l is the length of the section to be sealed of the target borehole, and the theoretical grouting volume is calculated according to the formula M 1 =v ρ, where M 1 is the theoretical grouting volume, and ρ is the slurry density. In some embodiments, in the step S2, the actual grouting amount is calculated according to a formula of M 2=M1 a, where M 2 is the actual grouting amount and a is a grouting coefficient. In some embodiments, in the step S3, the consumption of the sealing material is calculated according to the formula m= (M 2 x b)/(b+1), and the consumption of the water is calculated according to the formula n=m/b, where M is the consumption of the sealing material, N is the consumption of the water, and b is the mass ratio of the sealing material to the water. In some embodiments, in step S4, the viscosity of the slurry is monitored in real time while stirring the sealing material and the water, and after the viscosity reaches a preset value, step S5 is started. In a second aspect, an embodiment of the present invention provides a grouting system, for implementing the grouting method of any one of the above embodiments, including a grouting device for taking a preset amount of water and mixing and stirring the water and the sealing material, the grouting device for injecting a mixed liquid of the water and the sealing material into a target borehole, a weighing device for measuring a feeding amount of the sealing material and for delivering the sealing material to the grouting device, a control unit for calculating consumption amounts of the sealing material and the water, the control unit being electrically connected to the weighing device and the grouting device, the control unit being configured to control the weighing