Underground overlying strata internal settlement monitoring device

Abstract

The utility model discloses an underground overlying strata internal settlement monitoring device, which belongs to the technical field of deformation monitoring equipment and comprises a monitoring pipe and a monitoring mark, a plurality of groups of anchoring thorns for fixing are uniformly mounted on the side wall of the monitoring mark at equal intervals, the monitoring mark is fixed on the outer side wall of the monitoring pipe through a fine line scroll, and the monitoring pipe is placed in a drill hole; a monitoring pulley is arranged on the upper wall in the monitoring pipe, a communication cable is movably installed on the monitoring pulley, and a deformation monitoring probe is installed on the communication cable arranged in the monitoring pipe. The deformation monitoring probe improves the identification precision of the monitoring mark; through the monitoring mark and the installation structure system thereof, the limitation of the monitoring depth and the underground installation space of existing monitoring equipment is broken through; the overlying strata can be monitored from bottom to top in an underground roadway, the drilling depth and cost are greatly reduced, monitoring holes can be more accurately formed in a mining overlying strata area, and the site monitoring accuracy is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of deformation monitoring equipment, especially relates to an underground overburden internal settlement monitoring device. BACKGROUND

[0002] With the continuous development of city construction, the depth and breadth of the development and utilization of mineral resources are also increasing, resulting in the generation of a large number of large buried depth mines. In the process of underground coal mining, monitoring the deformation of the overburden is the most direct and effective method to ensure the safety and stability of the mining area and the surface structure, and the monitoring of deep rock-soil mass is a major problem in the industry at the present stage.

[0003] At present, the settlement monitoring of rock-soil mass is mainly through drilling from the ground to the monitoring layer, then installing monitoring equipment in the hole, and then realizing the settlement monitoring of rock mass. The main equipment includes distributed optical fiber sensing technology, multi-point displacement meter, layered settlement magnetic ring, etc. When the monitoring layer is deep, the monitoring cost is high, and at the same time, it is impossible to achieve large range, high density and high precision monitoring targets. Underground monitoring of overburden deformation is the only method to effectively reduce monitoring cost, but the existing underground deformation monitoring equipment only has a roof separation instrument, and its monitoring depth is extremely limited, and only the deformation monitoring of the shallow rock mass above the roadway can be realized. The monitoring points are few, and continuous distributed deformation monitoring cannot be realized. The monitoring mark is not synchronized with the movement and deformation of the rock layer, the monitoring data is invalid, the monitoring precision is low, and the data recording method is original, which cannot meet the research needs of overburden movement, so it cannot be well applied in engineering practice.

[0004] In summary, it is urgent to develop a high-precision, large-range, and large-density underground overburden internal settlement monitoring structure to fill the blank in the underground overburden deformation monitoring technology, reduce the monitoring cost, and provide a scientific basis for the stability evaluation and treatment of the goaf site. UTILITY MODEL CONTENT

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an underground overburden internal settlement monitoring device.

[0006] The utility model discloses a technical scheme as follows: a kind of underground overburden internal settlement monitoring device, including monitoring pipe and monitoring mark, in well roadway, utilize drilling equipment to form borehole, the inclination of borehole is 90 °-45 °, the side wall of monitoring mark is evenly installed with multiple groups of anchor spike for fixing at equal intervals, monitoring mark is fixed on the outer side wall of monitoring pipe by thin line scroll, monitoring mark and monitoring pipe are installed nearly concentric circle, the monitoring pipe is placed in borehole, after monitoring pipe extends to borehole top end, cut the thin line of binding monitoring mark, realize the separation of monitoring mark and monitoring pipe, and anchor spike above monitoring mark is pierced into overburden under the action of elastic potential energy, the upper wall of monitoring pipe is provided with monitoring pulley, communication cable is movably installed on the monitoring pulley, one end of communication cable is located outside borehole, the other end of communication cable is located in monitoring pipe, deformation monitoring probe is installed on the communication cable located in monitoring pipe.

[0007] Among them, the deformation monitoring probe is based on the principle of eddy current effect, which is modified from a metal detector, one end of the communication cable located outside the borehole is connected with a data storage device, and the communication cable is located above the monitoring pulley, and the preset length is not less than 2.2 times the depth of the borehole.

[0008] Further, the monitoring mark is a long strip structure, mainly composed of high-strength, high-elasticity and corrosion-resistant metal sheet, with a length not less than 1.1 times the circumference of the borehole and a thickness not more than 0.5 mm.

[0009] Among them, the anchor spike is a conical structure with a length not more than 1 cm, made of high-strength steel, and the anchor spike and the metal sheet are integrally arranged.

[0010] Among them, the top end of the monitoring pipe is provided with a conical metal guide head, the monitoring pulley is connected with the metal guide head, and the metal guide head can effectively prevent the protruding stones in the borehole from damaging the monitoring pipe or the monitoring mark.

[0011] Further, the bottom of the borehole is provided with a sealing plug mainly composed of concrete, with a passage reserved for the communication cable in the middle, and the sealing plug is mainly used to prevent the monitoring pipe from detaching from the borehole under the action of gravity.

[0012] After adopting the above structure, the utility model has the following beneficial effects:

[0013] (1) Increase the number of effective monitoring points: the monitoring mark is provided with anti-skid devices to improve the anchoring effect of the monitoring mark and the rock wall, reducing the impact of the falling stones in the hole on the position of the monitoring mark, and ensuring the number of effective monitoring marks during the monitoring period.

[0014] (2) Improve monitoring accuracy: based on the principle of non-contact induction positioning, the deformation monitoring probe is formed by metal detection technology, only when it is close to the monitoring mark, electromagnetic signal will be generated, so as to realize accurate identification of the position information of the monitoring mark, and the number of the monitoring mark can be accurately identified, so that the deformation information of the remaining monitoring marks can be identified in the case of partial monitoring mark failure, and the accuracy of the rock stratum settlement monitoring can be further improved.

[0015] (3) Reduce monitoring cost: from the underground space, the settlement position is more accurately positioned, the depth of the monitoring hole is reduced, and the drilling cost is reduced.

[0016] (4) The monitoring mark has low cost, high reliability, simple principle and operation, is suitable for rock mass settlement monitoring of various complex stratum conditions, and can adjust the structure of the monitoring mark and the diameter of the monitoring pipe to adapt to the installation requirements of different hole diameters. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation on the present application.

[0018] Figure 1 A structural schematic view of a downhole overburden internal settlement monitoring device is provided for the present application.

[0019] Figure 2 A monitoring mark installation schematic view is provided for the present application.

[0020] Figure 3 A state diagram of the monitoring mark fixed on the overburden hole wall is provided.

[0021] Figure 4 An original state diagram of the monitoring mark is provided for the present application.

[0022] In the drawings: 1, shaft, 2, rock stratum one, 3, rock stratum two, 4, drilling hole, 5, monitoring pipe, 6, monitoring pulley, 7, communication cable, 8, deformation monitoring probe, 9, monitoring mark, 10, plugging plug, 11, anchoring spike. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments; based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] like Figures 1-4 As shown, an underground overburden settlement monitoring device includes a monitoring pipe 5 and a monitoring marker 9. A borehole 4 is formed within a shaft 1 using a drilling device 4, with an inclination angle of 90°-45°. Multiple sets of anchoring spikes 11 are evenly spaced and installed on the sidewall of the monitoring marker 9 for fixation. The monitoring marker 9 is fixed to the outer wall of the monitoring pipe 5 by a thin thread spiral. The monitoring marker 9 and the monitoring pipe 5 are installed nearly concentrically. The monitoring pipe 5 is placed inside the borehole 4. After the monitoring pipe 5 extends to the top of the borehole 4, the thin thread binding the monitoring marker 9 is cut, separating the monitoring marker 9 from the monitoring pipe 5. Simultaneously, the anchoring spikes 11 on the monitoring marker 9 are released. Under the action of elastic potential energy, it penetrates into the overburden. At this time, the monitoring mark 9 and the borehole 4 are concentric circles and are closely attached to the borehole wall of the borehole 4, thereby realizing that the monitoring mark 9 and the overburden form an organic whole, reducing the risk of falling rocks in the hole affecting the displacement of the monitoring mark 9, and ensuring the synchronous movement of the monitoring mark 9 and the overburden. The upper wall of the monitoring tube 5 is provided with a monitoring pulley 6, and a communication cable 7 is movably installed on the monitoring pulley 6. One end of the communication cable 7 is located outside the borehole 4, and the other end of the communication cable 7 is located inside the monitoring tube 5. A deformation monitoring probe 8 is installed on the communication cable 7 located inside the monitoring tube 5.

[0026] The deformation monitoring probe 8 is based on the principle of eddy current effect and is modified from a metal detector. The communication cable 7 is located on the outside of the borehole 4 and connected to the data storage device. The communication cable 7 is located on the monitoring pulley 6 and its preset length is not less than 2.2 times the depth of the borehole 4.

[0027] The monitoring target 9 is a long strip structure, mainly composed of high-strength, high-elasticity, and corrosion-resistant metal sheets. Its length is not less than 1.1 times the circumference of the borehole 4, and its thickness does not exceed 0.5 mm.

[0028] The anchoring spike 11 is a conical structure with a length not exceeding 1cm. It is made of high-strength steel and the anchoring spike 11 and the metal sheet are set as a whole.

[0029] The top end of the monitoring pipe 5 is provided with a conical metal guide head, the monitoring pulley 6 is connected with the metal guide head, and the metal guide head can effectively prevent the protruding stones in the drilling hole 4 from damaging the monitoring pipe 5 or the monitoring marker 9.

[0030] The bottom of the drilling hole 4 is provided with a blocking plug 10 mainly composed of concrete, and a passage for the communication cable 7 is reserved in the middle of the blocking plug 10.

[0031] In specific use:

[0032] The monitoring marker 9 is fixed to the outer side wall of the monitoring pipe 5 through a thin line scroll, the monitoring marker 9 is installed in a near concentric circle with the monitoring pipe 5, the monitoring pipe 5 is placed in the drilling hole 4, after the monitoring pipe 5 extends to the top end of the drilling hole 4, the thin line binding the monitoring marker 9 is cut, the monitoring marker 9 is separated from the monitoring pipe 5 at the same time, the anchoring spike 11 on the monitoring marker 9 pierces into the overburden under the action of the elastic potential energy, at this time, the monitoring marker 9 is concentric with the drilling hole 4 and is tightly attached to the hole wall of the drilling hole 4, thereby realizing that the monitoring marker 9 and the overburden form an organic whole, reducing the risk of the displacement of the monitoring marker 9 affected by the falling stones in the hole, and ensuring the synchronous movement of the monitoring marker 9 and the overburden; the bottom of the drilling hole 4 is provided with the blocking plug 10 mainly composed of concrete, and a passage for the communication cable 7 is reserved in the middle of the blocking plug 10.

[0033] The working process of the deformation monitoring probe 8 detecting the monitoring marker 9 is as follows: when the deformation monitoring probe 8 moves up and down in the monitoring pipe 5, the communication cable 7 drives the meter counter to rotate and records the depth data of the deformation monitoring probe 8, at the same time, the deformation monitoring probe 8 can collect the signal strength sensed in real time, when it gradually approaches the monitoring marker 9, the sensing signal strength continuously increases, when it gradually moves away from the monitoring marker 9, the sensing signal strength continuously decreases, and the depth data corresponding to the peak value of the signal strength is the actual position of the monitoring marker 9, and in turn, the deformation monitoring probe 8 moves up and down in the monitoring pipe 5 once, and the position information of all the monitoring markers 9 can be realized.

[0034] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents. In general, if those skilled in the art are inspired, without departing from the creative purpose of the utility model, similar structure modes and embodiments are not creatively designed, which should belong to the protection scope of the utility model.

Claims

1. A device for monitoring subsidence within overburden in a mine, characterised in that, The utility model provides a kind of monitoring device for monitoring the deformation of well roadway, including monitoring pipe and monitoring mark, in well roadway, borehole is formed using drilling equipment, the side wall of the monitoring mark is evenly installed with multiple groups of anchor spike for fixing at equal intervals, the monitoring mark is fixed on the outer side wall of monitoring pipe by thin line scroll, the monitoring pipe is placed in borehole;The upper wall of the monitoring pipe is provided with monitoring pulley, the communication cable is movably installed on the monitoring pulley, one end of the communication cable is arranged outside borehole, the other end of the communication cable is arranged in monitoring pipe, and the communication cable arranged in monitoring pipe is provided with deformation monitoring probe.

2. The device for monitoring the subsidence in the internal part of the overburden of a mine shaft according to claim 1, characterised in that, The end of the communication cable arranged outside borehole is connected with data storage device.

3. The device for monitoring the subsidence in the internal part of the overburden of a mine shaft according to claim 1, characterised in that, The monitoring mark is a long strip structure.

4. The device for monitoring the subsidence in the internal part of the overburden of a mine shaft according to claim 1, characterized in that, The anchor spike is a conical structure.

5. The device for monitoring the subsidence in the internal part of the overburden of a mine shaft according to claim 1, characterized in that, The top end of the monitoring pipe is provided with a conical metal guide head, and the monitoring pulley is connected with the metal guide head.

6. The device for monitoring the subsidence in the internal part of the overburden of a mine shaft according to claim 1, characterized in that, The bottom of the borehole is provided with a blocking plug, and a passage for the communication cable is reserved in the middle.

Images