A monitoring hole distribution structure and a slurry monitoring device
By setting up monitoring holes around the grouting boreholes and equipping them with high-definition borehole inspection devices, the problem of difficulty in monitoring the grout diffusion range during overburden separation grouting was solved, achieving the effects of accurate monitoring and safe production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ORDOS ZHONGYU TAIDE COAL CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-06-12
AI Technical Summary
During the grouting process for overburden separation, the monitoring of the grout diffusion range cannot be accurately carried out, leading to difficulties in grouting implementation and potential hazards to mine safety. Existing technologies rely on theoretical calculations and lack real-time observation methods.
Design a monitoring hole distribution structure and slurry monitoring device, including monitoring holes No. 1, No. 2, and No. 3 around the grouting borehole, arranged based on the theoretical diffusion radius of the slurry, and combined with a high-definition borehole sight, lighting lamp, water level and pressure sensor, liquid resistivity tester and turbidity meter to monitor the slurry diffusion in real time.
It enables precise monitoring of the slurry diffusion range, reduces engineering workload and costs, ensures safe production downhole, provides real-time guidance, and has social and safety benefits.
Smart Images
Figure CN224351999U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of grouting and filling technology for overburden delamination, and in particular to a distribution structure of monitoring holes and a grout monitoring device. Background Technology
[0002] Currently, land subsidence caused by mining operations leads to numerous geological disasters; simultaneously, tailings accumulation on the surface causes problems such as the occupation of arable land and environmental pollution. In response, to achieve green and sustainable development in mining, overburden separation grouting technology has been widely applied in mining operations in recent years. Because the grouting layer selected for overburden separation grouting is located in the "micro-space" between the underground working face and the surface, the diffusion of the grout in the separation space cannot currently be effectively observed. The diffusion range can only be theoretically calculated based on the grout flow parameters and the size of the separation space. During the filling operation, with the same grouting volume, the actual diffusion range (diffusion radius) of the grout differs significantly from the theoretical calculation. If the diffusion range of the grout cannot be accurately monitored, it will cause difficulties in implementing overburden grouting, and the inability to monitor the diffusion range in a timely manner will affect the safe production of the mine. Utility Model Content
[0003] The purpose of this utility model is to provide a simple distribution structure for monitoring holes that reduces engineering workload and monitoring costs.
[0004] The second objective of this invention is to provide a slurry monitoring device that is easy to install, has high monitoring accuracy, and is convenient for real-time observation.
[0005] This utility model is implemented by the following technical solution: The objective of this patent is to provide a distribution structure for monitoring holes, which includes grouting boreholes. The discharge end of the grouting boreholes is located within the delamination space. Monitoring holes #1, #2, and #3 are arranged sequentially from near to far around the grouting boreholes. The distance L1 between monitoring hole #1 and the grouting borehole is the theoretical diffusion radius R of the grout. k 1 / 2; the distance L2 between the No. 2 monitoring hole and the grouting borehole is the theoretical diffusion radius R of the grout. k The distance L3 between the monitoring hole #3 and the grouting borehole is the theoretical diffusion radius R of the grout. k Twice that of the grout, wherein the center of the grout diffusion is the grouting borehole.
[0006] Furthermore, the theoretical diffusion radius R of the slurry k The calculation formula is:
[0007]
[0008] Where M is the thickness of the coal seam.
[0009] The second objective of this patent is to provide a slurry monitoring device placed inside a monitoring hole, which includes a mounting cylinder. A counterweight is integrally fixed to the bottom of the mounting cylinder. An epoxy resin protective cover is fixed inside the mounting cylinder above the counterweight. A high-definition borehole inspection device is fixed inside the epoxy resin protective cover. Several lighting lamps are also fixedly installed inside the epoxy resin protective cover around the high-definition borehole inspection device. Several mounting holes are opened on the side wall of the mounting cylinder above the epoxy resin protective cover. The high-definition borehole inspection device and the lighting lamps are respectively connected to the computer via optical cables.
[0010] Furthermore, a water level pressure sensor, a liquid resistivity tester, and a turbidity meter are sequentially fixedly installed in the mounting hole, and the water level pressure sensor, the liquid resistivity tester, and the turbidity meter are respectively connected to the computer via optical cables.
[0011] The advantages of this utility model are as follows: 1. This utility model has a simple structure and is easy to implement. The monitoring holes around the grouting borehole are arranged according to the theoretical diffusion radius of the slurry, which avoids the need for multiple monitoring holes, thus reducing the workload and monitoring costs, while ensuring the accuracy of subsequent monitoring results within the monitoring holes. 2. The monitoring device is placed directly in each monitoring hole, making installation convenient. It also provides high monitoring accuracy and facilitates real-time observation, avoiding reliance on theoretical calculations. It allows for real-time monitoring of the slurry diffusion range during overburden separation grouting, providing guidance for overburden separation grouting work. The slurry diffusion range has a demonstrative effect under the same geological conditions, and the conclusions drawn from this utility model can serve as regional grouting experience values, yielding certain social benefits. Simultaneously, accurate slurry diffusion range ensures safe production downhole, providing significant safety benefits. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.
[0014] Figure 2 for Figure 1 A cross-sectional schematic diagram of the monitoring hole.
[0015] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this utility model.
[0016] Figure 4 This is a schematic diagram of the connection structure between the monitoring device and the computer.
[0017] Grouting borehole 1, 1# monitoring hole 2, 2# monitoring hole 3, 3# monitoring hole 4, monitoring device 5, mounting cylinder 51, mounting hole 511, counterweight 52, epoxy resin protective cover 53, high-definition borehole inspection instrument 54, lighting lamp 55, water level and pressure sensor 56, liquid resistivity tester 57, turbidity meter 58, computer 6. Detailed Implementation
[0018] Example 1: As Figure 1-2 As shown, a monitoring hole distribution structure includes a grouting borehole 1, the discharge end of which is located within the delamination space. Monitoring holes 1#2, 2#3, and 3#4 are sequentially arranged around the grouting borehole 1 from near to far. The distance L1 between monitoring hole 1#2 and the grouting borehole 1 is the theoretical diffusion radius R of the grout. k 1 / 2; the distance L2 between monitoring hole 3 and grouting borehole 1 is the theoretical diffusion radius R of the grout. k The distance L3 between monitoring hole #3 (4) and grouting borehole #1 is the theoretical diffusion radius R of the grout. k It is twice that of the grout, with the center of the grout diffusion being the grouting borehole 1.
[0019] Theoretical diffusion radius R of slurry k The calculation formula is:
[0020]
[0021] Where M is the thickness of the coal seam.
[0022] Example 2: Figure 3-4 As shown, a slurry monitoring device 5 placed in the monitoring hole of Embodiment 1 includes a mounting cylinder 51. A counterweight 52 is integrally fixed at the bottom of the mounting cylinder 51 to facilitate the sinking of the monitoring device 5 into the monitoring hole and to its bottom. An epoxy resin protective cover 53 is fixed inside the mounting cylinder 51 above the counterweight 52 to provide waterproof and pressure-resistant protection for the high-definition borehole inspection device 54 and the lighting lamp 55. The high-definition borehole inspection device 54 is fixed inside the epoxy resin protective cover 53, which can most directly detect the slurry as "visual evidence". Several lighting lamps 55 are also fixedly installed inside the epoxy resin protective cover 53 around the high-definition borehole inspection device 54 to provide illumination for the high-definition borehole inspection device 54 to take pictures. Several mounting holes 511 are opened on the side wall of the mounting cylinder 51 above the epoxy resin protective cover 53. The high-definition borehole inspection device 54 and the lighting lamps 55 are respectively connected to the computer 6 through optical cables.
[0023] A water level pressure sensor 56, a liquid resistivity meter 57, and a turbidity meter 58 are also sequentially fixedly installed in the mounting hole 511. These sensors are connected to the computer 6 via optical cables. The water level pressure sensor 56 monitors the water level changes in the monitoring hole in real time. When the slurry is about to arrive, the water level in the monitoring hole will rise significantly, serving as an early warning. The liquid resistivity meter 57: When the slurry enters the formation, due to the concentration difference, water molecules in the slurry diffuse with ions in the formation water. The slurry's salinity is lower than that of the formation water, and high-concentration ions in the formation water diffuse into the slurry, causing the ion concentration in the slurry area to gradually increase and the resistivity to decrease. Therefore, monitoring the resistivity can quickly detect the diffusion of the slurry. The turbidity meter 58: When the slurry reaches the monitoring hole, the corresponding turbidity will increase, thus allowing for judgment.
[0024] Computer 6 is used to analyze, process, and display data, while optical fiber enables information transmission, power supply to electrical equipment, and the deployment and retrieval of monitoring device 5.
[0025] Working principle: The monitoring holes and monitoring device 5 should be installed and debugged before grouting begins in grouting borehole 1. During grouting (the grout concentration must be kept relatively stable), the data changes in each monitoring hole should be observed in real time, and the grouting volume and grouting pressure of grouting borehole 1 should be recorded. Based on the detection results of each monitoring hole, the diffusion range and distribution pattern of the grout in the overburden separation layer are obtained through comprehensive analysis.
[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A distribution structure for monitoring holes, comprising grouting boreholes, wherein the discharge end of the grouting boreholes is located within a separation space, characterized in that, Monitoring holes #1, #2, and #3 are sequentially arranged around the grouting borehole from near to far. The distance L1 between monitoring hole #1 and the grouting borehole is the theoretical diffusion radius R of the grout. k 1 / 2; the distance L2 between the No. 2 monitoring hole and the grouting borehole is the theoretical diffusion radius R of the grout. k The distance L3 between the monitoring hole #3 and the grouting borehole is the theoretical diffusion radius R of the grout. k Twice that of the grout, wherein the center of the grout diffusion is the grouting borehole.
2. The distribution structure of monitoring holes according to claim 1, characterized in that, The theoretical diffusion radius R of the slurry k The calculation formula is: Where M is the thickness of the coal seam.
3. A slurry monitoring device placed within a monitoring hole as described in any one of claims 1-2, characterized in that, It includes a mounting cylinder, a counterweight is integrally fixed to the bottom of the mounting cylinder, an epoxy resin protective cover is fixed inside the mounting cylinder above the counterweight, a high-definition drilling and viewing instrument is fixed inside the epoxy resin protective cover, and several lighting lamps are also fixedly installed inside the epoxy resin protective cover around the high-definition drilling and viewing instrument; several mounting holes are opened on the side wall of the mounting cylinder above the epoxy resin protective cover, and the high-definition drilling and viewing instrument and the lighting lamps are respectively connected to a computer via optical cables.
4. The slurry monitoring device according to claim 3, characterized in that, A water level pressure sensor, a liquid resistivity tester, and a turbidity meter are also fixedly installed in sequence in the mounting hole. The water level pressure sensor, the liquid resistivity tester, and the turbidity meter are respectively connected to the computer via optical cables.