CN205785167U - A kind of measurement apparatus of protected seam dilatancy amount - Google Patents
A kind of measurement apparatus of protected seam dilatancy amount Download PDFInfo
- Publication number
- CN205785167U CN205785167U CN201620748462.6U CN201620748462U CN205785167U CN 205785167 U CN205785167 U CN 205785167U CN 201620748462 U CN201620748462 U CN 201620748462U CN 205785167 U CN205785167 U CN 205785167U
- Authority
- CN
- China
- Prior art keywords
- tray
- measuring device
- hollow rod
- spring
- displacement sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
本实用新型公开了一种被保护层膨胀变形量的测量装置，包括顶板位移测量装置和底板位移测量装置；顶板位移测量装置包括上部小托盘、下部小托盘、第一空心杆、第一弹簧、第一数据传输线、第一位移传感器和第一数显表；底板位移测量装置包括上部大托盘、下部大托盘、第二空心杆、第二弹簧、第二数据传输线、第二位移传感器和第二数显表；所述上部大托盘和下部大托盘的中部设置有通孔，所述第一空心杆依次通过上部大托盘和下部大托盘中部的通孔后嵌套在第二空心杆中。本实用新型能克服钻孔不稳定及塌孔等不稳定因素，且弹簧可灵敏的捕捉到保护层开采过程中被保护层膨胀变形的所有变化，使得监测数据及时、准确，测量精度更高。
The utility model discloses a measuring device for the amount of expansion and deformation of a protected layer, which comprises a top plate displacement measuring device and a bottom plate displacement measuring device; the top plate displacement measuring device comprises an upper small tray, a lower small tray, a first hollow rod, a first spring, The first data transmission line, the first displacement sensor and the first digital display table; the bottom plate displacement measuring device includes an upper large tray, a lower large tray, a second hollow rod, a second spring, a second data transmission line, a second displacement sensor and a second Digital display meter; through holes are provided in the middle of the upper large tray and the lower large tray, and the first hollow rod is nested in the second hollow rod after passing through the through holes in the middle of the upper large tray and the lower large tray in turn. The utility model can overcome unstable factors such as drilling instability and hole collapse, and the spring can sensitively capture all changes in the expansion and deformation of the protected layer during the mining process of the protective layer, so that the monitoring data is timely and accurate, and the measurement accuracy is higher.
Description
技术领域technical field
本实用新型涉及一种变形测量装置，尤其涉及一种被保护层膨胀变形量的测量装置，属于煤矿防瓦斯突出安全治理技术领域。The utility model relates to a deformation measuring device, in particular to a measuring device for expansion and deformation of a protected layer, which belongs to the technical field of coal mine anti-gas outburst safety management.
背景技术Background technique
《煤矿安全规程》明确规定：“在煤与瓦斯突出矿井开采煤层群时，必须首先开采保护层。开采保护层后，在被保护层中受到保护的区域按无突出危险煤层进行采掘工作，未受到保护的区域，必须采取防止突出危险措施”。开采保护层是防治煤与瓦斯突出最有效的一种区域性防突措施，在煤层群开采条件的突出矿井得到了广泛应用。其本质为：保护层开采之后围岩卸压产生膨胀变形，产生瓦斯“增流效应”，透气性增强，为被保护层的卸压瓦斯抽采创造有利条件。The "Coal Mine Safety Regulations" clearly stipulates: "When mining coal seam groups in coal and gas outburst mines, the protective layer must be mined first. After mining the protective layer, the protected area in the protected layer shall be excavated as a non-outburst dangerous coal seam. In protected areas, measures must be taken to prevent prominent dangers." Mining protection layer is the most effective regional outburst prevention measure to prevent coal and gas outburst, and it has been widely used in outburst mines with coal seam group mining conditions. Its essence is: after the protective layer is mined, the surrounding rock will expand and deform due to pressure relief, resulting in a gas "increasing effect", and the air permeability will be enhanced, creating favorable conditions for the pressure relief gas drainage of the protected layer.
《防治煤与瓦斯突出规定》第四十条中明确规定：突出矿井首次开采某个保护层时，应当对被保护层进行区域措施效果检验及保护范围的实际考察。如果被保护层的最大膨胀变形量大于千分之三，则检验和考察结果可适用于其他区域的同一保护层和被保护层；否则，应当对每个预计的被保护区域进行区域措施效果检验。可见，被保护层膨胀变形量作为评价保护层开采卸压增透的重要指标，在保护层开采中起到重要作用。Article 40 of the "Regulations on the Prevention and Control of Coal and Gas Outbursts" clearly stipulates that when an outburst mine mines a certain protective layer for the first time, the protected layer should be tested for the effect of regional measures and the actual inspection of the protection scope. If the maximum expansion and deformation of the protected layer is greater than 3/1000, the inspection and investigation results can be applied to the same protective layer and protected layer in other areas; otherwise, the regional measure effect test should be carried out for each expected protected area . It can be seen that the expansion and deformation of the protected layer, as an important index for evaluating the pressure relief and permeability enhancement of the mining of the protective layer, plays an important role in the mining of the protective layer.
目前，现场观测被保护层的膨胀变形主要采用深部基点法观测，其原理为：布置钻孔穿过被保护层的顶、底板，在顶底板中布置测点，通过观测顶、底板测点之间的相对位移进而确定被保护层的膨胀变形量。实用新型专利CN 104482914 A(201410844168.0)一种远距离被保护层膨胀变形量测定装置，它包括煤层顶板基点固定器、顶板基点测定线、连接管、煤层底板基点固定器、底板基点测定线，保护套管、套管连接头。煤层顶、底板布置基点固定器，二者通过连接管插接相连，管体四周翼翅呈张开状态，进而对保护层膨胀变形量进行测定；实用新型专利CN 104344785 A(201410637115.1)煤层细微变形量自动测试装置通过利用煤层发生变形后，不锈钢管和钢丝绳随之产生相对位移，从而带动刻度尺或数显表移动，对保护层开采后被保护层的变形量进行测量。At present, the on-site observation of the expansion and deformation of the protected layer is mainly observed by the deep base point method. The relative displacement between them determines the expansion and deformation of the protected layer. Utility model patent CN 104482914 A (201410844168.0) is a device for measuring the expansion and deformation of a long-distance protected layer, which includes a coal seam roof base point fixer, a roof base point measurement line, a connecting pipe, a coal seam bottom plate base point fixer, a bottom plate base point measurement line, protection Casing, casing connector. The base point fixer is arranged on the top and bottom of the coal seam, and the two are connected through a connecting pipe. The wings around the pipe body are in an open state, and then the expansion and deformation of the protective layer are measured; utility model patent CN 104344785 A (201410637115.1) fine deformation of the coal seam The automatic measurement device measures the deformation of the protected layer after the mining of the protective layer by using the relative displacement of the stainless steel pipe and the steel wire rope after the deformation of the coal seam, thereby driving the scale or the digital display meter to move.
不难看出，上述专利均能够测得被保护层膨胀变形，但实际操作中，由于钻孔穿层较多，受采动影响较大，尤其是被保护层顶底板岩性相对偏软，钻孔不稳定、孔壁易剥落甚至塌孔，导致测试结果误差较大，甚至出现错误，严重威胁到被保护层的开采安全。而基于超声波及电磁辐射的探测信号进行观测时，探测信号受干扰较多，更适于对卸压范围的区域探测，对于被保护层变形膨胀探测难度大、准确度低，系统整体稳定性差、耗费人力物力极大且成本较高，不易于大规模推广。It is not difficult to see that the above-mentioned patents can all measure the expansion and deformation of the protected layer, but in actual operation, due to the fact that drilling penetrates more layers, it is greatly affected by mining, especially the lithology of the roof and floor of the protected layer is relatively soft. The hole is unstable, the hole wall is easy to peel off or even collapses, resulting in large errors in the test results, or even mistakes, which seriously threaten the mining safety of the protected layer. However, when the detection signals based on ultrasonic waves and electromagnetic radiation are observed, the detection signals are subject to more interference, which is more suitable for the detection of areas within the pressure relief range. It is difficult to detect the deformation and expansion of the protected layer, and the accuracy is low, and the overall stability of the system is poor. It consumes a lot of manpower and material resources and is expensive, so it is not easy to promote on a large scale.
实用新型内容Utility model content
有鉴于此，本实用新型的目的是提供一种被保护层膨胀变形量的测量装置，以实现对被保护层膨胀变形量的准确探测。In view of this, the purpose of this utility model is to provide a measuring device for the amount of expansion and deformation of the protected layer, so as to realize accurate detection of the amount of expansion and deformation of the protected layer.
本实用新型一种被保护层膨胀变形量的测量装置，包括顶板位移测量装置和底板位移测量装置；The utility model relates to a measuring device for expansion and deformation of a protected layer, comprising a top plate displacement measuring device and a bottom plate displacement measuring device;
所述顶板位移测量装置包括上部小托盘、下部小托盘、第一空心杆、第一弹簧、第一数据传输线、第一位移传感器和第一数显表；所述第一弹簧的上端连接上部小托盘，第一弹簧的下端通过第一位移传感器连接下部小托盘，所述第一位移传感器固定在下部小托盘的顶面上，所述第一空心杆的上端与下部小托盘的底面焊接；The top plate displacement measuring device includes an upper small tray, a lower small tray, a first hollow rod, a first spring, a first data transmission line, a first displacement sensor and a first digital display; the upper end of the first spring is connected to the upper small Tray, the lower end of the first spring is connected to the lower small tray through the first displacement sensor, the first displacement sensor is fixed on the top surface of the lower small tray, and the upper end of the first hollow rod is welded to the bottom surface of the lower small tray;
所述底板位移测量装置包括上部大托盘、下部大托盘、第二空心杆、第二弹簧、第二数据传输线、第二位移传感器和第二数显表，所述第二弹簧的上端连接上部大托盘，第二弹簧的下端通过第二位移传感器连接下部大托盘，所述第二位移传感器固定在下部大托盘的顶面上，所述第二空心杆的上端焊接在下部大托盘的底面上；The base plate displacement measuring device includes an upper large tray, a lower large tray, a second hollow rod, a second spring, a second data transmission line, a second displacement sensor and a second digital display, and the upper end of the second spring is connected to the upper large Tray, the lower end of the second spring is connected to the lower large pallet through the second displacement sensor, the second displacement sensor is fixed on the top surface of the lower large pallet, and the upper end of the second hollow rod is welded on the bottom surface of the lower large pallet;
所述上部大托盘和下部大托盘的中部设置有通孔，所述第一空心杆依次通过上部大托盘和下部大托盘中部的通孔后嵌套在第二空心杆中；The middle part of the upper large tray and the lower large tray is provided with a through hole, and the first hollow rod is nested in the second hollow rod after sequentially passing through the through holes in the middle part of the upper large tray and the lower large tray;
所述第一数据线的一端与第一位移传感器连接，第一数据线的另一端经第一空心杆的内孔引出与第一数显表连接；One end of the first data line is connected to the first displacement sensor, and the other end of the first data line is led out through the inner hole of the first hollow rod to be connected to the first digital display meter;
所述第二数据线的一端与第二位移传感器连接，第二数据线的另一端经第二空心杆的内孔引出与第二数显表连接。One end of the second data line is connected to the second displacement sensor, and the other end of the second data line is led out through the inner hole of the second hollow rod to be connected to the second digital display meter.
本实用新型的有益效果：The beneficial effects of the utility model:
1、本实用新型被保护层膨胀变形量的测量装置，使用时，先在被保护层下方巷道利用钻机施工倾角80°以上、孔径79mm的钻孔，钻孔穿过煤层，达到顶板处停止施工，然后利用钻机对钻孔进行扩孔作业，孔径扩至133mm，扩孔深度达到煤层和底板交界处停止扩孔；再先将顶板位移测量装置送至钻孔顶部，接着再将底板位移测量装置送至扩孔的顶端，安装固定好测量装置后，即可进行测量；本实用新型被保护层膨胀变形量的测量装置，其能克服钻孔不稳定及塌孔等不稳定因素，测量更准确。1. The measuring device for the amount of expansion and deformation of the protected layer of the present invention, when in use, first use a drilling rig to drill holes with an inclination angle of more than 80° and a diameter of 79 mm in the roadway below the protected layer, and drill holes through the coal seam to stop construction at the roof , and then use the drilling rig to ream the borehole, the aperture is expanded to 133mm, and the reaming depth reaches the junction of the coal seam and the bottom plate to stop reaming; then the top plate displacement measuring device is sent to the top of the borehole, and then the bottom plate displacement measuring device Send it to the top of the reaming hole, and after installing and fixing the measuring device, the measurement can be carried out; the utility model is a measuring device for the expansion and deformation of the protected layer, which can overcome unstable factors such as drilling instability and hole collapse, and the measurement is more accurate .
2、本实用新型被保护层膨胀变形量的测量装置，考虑到被保护层变形膨胀量较小，通过位移测量装置中设置的弹簧可灵敏的捕捉到保护层开采过程中被保护层膨胀变形的所有变化，使得监测数据及时、准确，精度更高。2. The measuring device for the expansion and deformation of the protected layer of the utility model, considering that the deformation and expansion of the protected layer is small, the spring provided in the displacement measuring device can sensitively capture the expansion and deformation of the protected layer during the mining process. All the changes make the monitoring data timely, accurate and with higher precision.
3、本实用新型被保护层膨胀变形量的测量装置，其采用的测量装置整体结构简单、易操作，适应性强、干扰因素少、成本低、适合大规模推广。3. The measuring device for the amount of expansion and deformation of the protected layer of the present invention has a simple overall structure, easy operation, strong adaptability, few interference factors, low cost, and is suitable for large-scale promotion.
附图说明Description of drawings
图1为本实用新型被保护层膨胀变形量的测量装置的结构示意图；Fig. 1 is the structural representation of the measuring device of the protected layer expansion and deformation amount of the utility model;
图中，1-上部小托盘、2-下部小托盘、3-第一空心杆、4-第一弹簧、5-第一数据传输线、6-第一位移传感器、7-第一数显表、8-上部大托盘、9-下部大托盘、10-第二空心杆、11-第二弹簧、12-第二数据传输线、13-第二位移传感器、14-第二数显表、15-钻孔、16-煤层、17-顶板、18-底板、19-聚氨酯。In the figure, 1-upper small tray, 2-lower small tray, 3-first hollow rod, 4-first spring, 5-first data transmission line, 6-first displacement sensor, 7-first digital display, 8-upper large tray, 9-lower large tray, 10-second hollow rod, 11-second spring, 12-second data transmission line, 13-second displacement sensor, 14-second digital display, 15-drill Hole, 16-coal seam, 17-top plate, 18-bottom plate, 19-polyurethane.
具体实施方式detailed description
下面结合附图和实施例对本实用新型作进一步描述。Below in conjunction with accompanying drawing and embodiment the utility model is described further.
如图所示，本实施例被保护层膨胀变形量的测量装置，包括顶板位移测量装置和底板位移测量装置；As shown in the figure, the measurement device for the expansion and deformation of the protected layer in this embodiment includes a top plate displacement measurement device and a bottom plate displacement measurement device;
所述顶板位移测量装置包括上部小托盘1、下部小托盘2、第一空心杆3、第一弹簧4、第一数据传输线5、第一位移传感器6和第一数显表7；所述第一弹簧的上端连接上部小托盘，第一弹簧的下端通过第一位移传感器连接下部小托盘，所述第一位移传感器固定在下部小托盘的顶面上，所述第一空心杆的上端与下部小托盘的底面焊接；The top plate displacement measuring device comprises an upper small tray 1, a lower small tray 2, a first hollow rod 3, a first spring 4, a first data transmission line 5, a first displacement sensor 6 and a first digital display 7; The upper end of a spring is connected to the upper small tray, the lower end of the first spring is connected to the lower small tray through the first displacement sensor, the first displacement sensor is fixed on the top surface of the lower small tray, the upper end of the first hollow rod and the lower part The bottom surface of the small tray is welded;
所述底板位移测量装置包括上部大托盘8、下部大托盘9、第二空心杆10、第二弹簧11、第二数据传输线12、第二位移传感器13和第二数显表14，所述第二弹簧的上端连接上部大托盘，第二弹簧的下端通过第二位移传感器连接下部大托盘，所述第二位移传感器固定在下部大托盘的顶面上，所述第二空心杆的上端焊接在下部大托盘的底面上；The base plate displacement measuring device comprises an upper large tray 8, a lower large tray 9, a second hollow rod 10, a second spring 11, a second data transmission line 12, a second displacement sensor 13 and a second digital display 14, the first The upper end of the two springs is connected to the upper large tray, the lower end of the second spring is connected to the lower large tray through the second displacement sensor, the second displacement sensor is fixed on the top surface of the lower large tray, and the upper end of the second hollow rod is welded on On the bottom surface of the lower large tray;
所述上部大托盘和下部大托盘的中部设置有通孔，所述第一空心杆依次通过上部大托盘和下部大托盘中部的通孔后嵌套在第二空心杆中；The middle part of the upper large tray and the lower large tray is provided with a through hole, and the first hollow rod is nested in the second hollow rod after sequentially passing through the through holes in the middle part of the upper large tray and the lower large tray;
所述第一数据线的一端与第一位移传感器连接，第一数据线的另一端经第一空心杆的内孔引出与第一数显表连接；One end of the first data line is connected to the first displacement sensor, and the other end of the first data line is led out through the inner hole of the first hollow rod to be connected to the first digital display meter;
所述第二数据线的一端与第二位移传感器连接，第二数据线的另一端经第二空心杆的内孔引出与第二数显表连接。One end of the second data line is connected to the second displacement sensor, and the other end of the second data line is led out through the inner hole of the second hollow rod to be connected to the second digital display meter.
本实用新型被保护层膨胀变形量的测量装置，其使用过程如下：The utility model is a measuring device for the amount of expansion and deformation of the protected layer, and its use process is as follows:
1)、在被保护层下部选择煤岩层赋存稳定的巷道，利用钻机施工倾角80°以上、孔径79mm的钻孔，钻孔15穿过煤层16，达到顶板17处停止施工；1), in the lower part of the protected layer, select a roadway with stable coal and rock formations, use a drilling rig to drill holes with an inclination angle of more than 80° and a diameter of 79mm, drill hole 15 passes through coal seam 16, and stop construction when it reaches roof 17;
2)、利用钻机对钻孔进行扩孔作业，孔径扩至133mm，扩孔深度达到煤层和底板18交界处停止扩孔；2), use the drilling rig to carry out the reaming operation on the borehole, the aperture is expanded to 133mm, and the reaming depth reaches the junction of the coal seam and the bottom plate 18 to stop reaming;
3)、先将顶板位移测量装置送至钻孔顶部，然后再将底板位移测量装置送至扩孔的顶端；3) Send the top plate displacement measuring device to the top of the drilled hole first, and then send the bottom plate displacement measuring device to the top of the reaming hole;
4)、利用聚氨酯19将第一空心杆和第二空心杆固定在钻孔孔口处；4), utilize polyurethane 19 to fix the first hollow rod and the second hollow rod at the hole hole;
5)、对第一位移传感器和第二位移传感器进行校准，对第一数显表和第二数显表进行归零，记录顶板位移测量装置初始数据d1和底板位移测量装置初始数据d2；5) Calibrate the first displacement sensor and the second displacement sensor, reset the first digital display meter and the second digital display meter to zero, and record the initial data d 1 of the top plate displacement measuring device and the initial data d 2 of the bottom plate displacement measuring device ;
6)、保护层工作面推过后，读取顶板位移测量装置初始数据d3和底板位移测量装置初始数据d4；6), after the working surface of the protective layer is pushed, read the initial data d3 of the top plate displacement measuring device and the initial data d4 of the bottom plate displacement measuring device;
7)、将两次收集的数据代入公式D＝(d4-d2)-(d3-d1)，计算得到被保护层膨胀变形量D。7) Substitute the data collected twice into the formula D=(d 4 -d 2 )-(d 3 -d 1 ), and calculate the expansion and deformation amount D of the protected layer.
本实用新型能克服钻孔不稳定及塌孔等不稳定因素，测量更准确；而且本实施例被保护层膨胀变形量的测量装置，考虑到被保护层变形膨胀量较小，通过位移测量装置中设置的弹簧可灵敏的捕捉到保护层开采过程中被保护层膨胀变形的所有变化，使得监测数据及时、准确，精度更高；进一步本实施例被保护层膨胀变形量的测量装置，其整体结构简单、易操作，适应性强、干扰因素少、成本低、适合大规模推广。The utility model can overcome unstable factors such as drilling instability and hole collapse, and the measurement is more accurate; and the measurement device for the expansion and deformation of the protected layer in this embodiment, considering that the deformation and expansion of the protected layer is small, through the displacement measurement device The spring provided in the protective layer can sensitively capture all changes in the expansion and deformation of the protected layer during the mining process, so that the monitoring data is timely, accurate, and more precise; furthermore, the measurement device for the amount of expansion and deformation of the protected layer in this embodiment, its overall The structure is simple, easy to operate, strong adaptability, less interference factors, low cost, and suitable for large-scale promotion.
最后说明的是，以上实施例仅用以说明本实用新型的技术方案而非限制，尽管参照较佳实施例对本实用新型进行了详细说明，本领域的普通技术人员应当理解，可以对本实用新型的技术方案进行修改或者等同替换，而不脱离本实用新型技术方案的宗旨和范围，其均应涵盖在本实用新型的权利要求范围当中。Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the spirit and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620748462.6U CN205785167U (en) | 2016-07-15 | 2016-07-15 | A kind of measurement apparatus of protected seam dilatancy amount |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620748462.6U CN205785167U (en) | 2016-07-15 | 2016-07-15 | A kind of measurement apparatus of protected seam dilatancy amount |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205785167U true CN205785167U (en) | 2016-12-07 |
Family
ID=58122767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620748462.6U Expired - Fee Related CN205785167U (en) | 2016-07-15 | 2016-07-15 | A kind of measurement apparatus of protected seam dilatancy amount |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205785167U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107232153A (en) * | 2017-07-28 | 2017-10-10 | 德阳市夏季风渔具有限公司 | Magnetic force triggers auto fishing device |
| WO2022247044A1 (en) * | 2021-05-28 | 2022-12-01 | 中煤科工集团沈阳研究院有限公司 | Liquid injection-type protected layer expansion deformation amount automatic measurement device and use method |
| CN116105673A (en) * | 2023-03-13 | 2023-05-12 | 湖南科技大学 | A recyclable protective layer expansion deformation test device and its use method |
-
2016
- 2016-07-15 CN CN201620748462.6U patent/CN205785167U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107232153A (en) * | 2017-07-28 | 2017-10-10 | 德阳市夏季风渔具有限公司 | Magnetic force triggers auto fishing device |
| WO2022247044A1 (en) * | 2021-05-28 | 2022-12-01 | 中煤科工集团沈阳研究院有限公司 | Liquid injection-type protected layer expansion deformation amount automatic measurement device and use method |
| CN116105673A (en) * | 2023-03-13 | 2023-05-12 | 湖南科技大学 | A recyclable protective layer expansion deformation test device and its use method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106197363B (en) | A kind of measurement method of protected seam dilatancy amount | |
| US10585202B2 (en) | Acoustic sensing with azimuthally distributed transmitters and receivers | |
| CN105318824B (en) | A kind of method that wall rock loosening ring is measured based on distributed resistance foil gauge | |
| CN106593424B (en) | Back rock Protodyakonov coefficient based on sound level meter is with brill detection method | |
| CN103147737A (en) | Drilling detection method for disclosing law of overburden failure in ascending mining | |
| CN106401557B (en) | A method for jointly testing coal seam gas content and gas pressure to determine effective drilling radius | |
| CN107392394A (en) | A kind of dynamic monitoring driving face coal and gas prominent hazard prediction method | |
| CN103591922A (en) | Method for detecting upper coal seam floor damage depth radon gas in close-distance coal seam mining | |
| CN204060675U (en) | π production well log system | |
| CN106052629B (en) | A kind of coal seam with gas dilatancy measurement method | |
| CN207795239U (en) | Casing leakage point detection device and system | |
| CN205808394U (en) | A kind of coal seam with gas dilatancy measurement apparatus | |
| CN105756709A (en) | Working face roof weighing and fracture monitoring method | |
| CN103556981B (en) | A kind of drilling construction automatic monitoring system | |
| CN204126640U (en) | π storage type logging system | |
| CN108442925B (en) | Water pressure and water temperature intelligent measurement device suitable for advanced geological forecast of mine | |
| CN207636595U (en) | A kind of mining geology survey device | |
| CN206694020U (en) | The device of gas cut is monitored in real time using the pressure wave signal of measurement while drilling instrument | |
| CN209873904U (en) | Three-in-one multifunctional geotechnical engineering monitoring device | |
| CN205477594U (en) | Along with boring inclinometer | |
| CN110630320B (en) | Overburden rock isolation grouting filling position determination method based on drilling injection flow measurement | |
| CN204101017U (en) | Dew well coal mining slope displacement monitoring device | |
| CN203572970U (en) | Overburden failure range detection system under impact of mining | |
| CN100494636C (en) | Telemetry Forecasting Method of Hard Roof in Goaf | |
| CN205422692U (en) | Portable drilling angular instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20190715 |