Coal mine gob-side entry retaining roadside segment bearing unequal strength support principle and application
A technology of unequal and coal mines, which is applied to the principle and application field of unequal strong support for segmental bearing beside the gob-side entry retaining in coal mines
Inactive Publication Date: 2012-11-07
成云海 +1
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The side support of the transport roadway is divided into upper and lower layers of filling material combined support
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[0020] 3. Repair the roof bolt (11) 1.7m away from the upper side (4) to prevent the filling side roof from falling, and then retract the single hydraulic prop (5) and hinged roof beam (6);
[0021] 4. Predict according to the law of movement of the rock formation (old roof (1) and direct roof (2)), it is estimated that the subsidence of the first mining old roof (10) contacting gangue (8) and the second mining of the old roof (10) 9) contact with the subsidence of gangue (8), determine the thickness and strength of the upper support (13) and the thickness and strength of the lower support (14) of the roadside support;
[0022] 5. The width of the upper layer filling body (13) and the lower layer filling body (14) is generally equal to the thickness of the mined coal seam, and the specific width is determined according to the calculation of the top cutting resistance;
[0023] 6. Arrange the lower filling bag (17), ensure that the lower filling bag (17) is laid in place, and e...
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The invention discloses a support principle which is suitable for coal mine gob-side entry retaining segment bearing roadside support and an application method. After a working surface begins to be exploited, a transport road adopts gob-side entry retaining which is completely preserved to be used as a return airway for the next working surface. According to characteristics of stratum movement, the segment bearing principle is put forward to carry out the roadside unequal strength support. The roadside unequal strength support is that bearing-deformation of a roadside support material carriesout support of different strengths according to the segment movement intensity of the stratum in order to adapt to movement characteristics in different phases, namely different stratum movement phases, and correspondingly, the roadside support material has different mechanical properties and bearing-deformation parameters. Roadway support of the transport road is combined support by upper-layer padding and lower-layer padding. The whole padding combination body has not only large deformation amount but also high bearing strength, thus achieving double effects of support and sealing. The coalmine gob-side entry retaining roadside segment bearing unequal strength support principle and the application method are suitable for coal mine underground gob-side entry retaining roadside support.
Description
technical field [0001] This application relates to the principle and application method of segmental unequal strong support beside gob-side entry retaining in coal mines. Background technique [0002] Coal mine gobside entry retention (such as figure 1 (shown) means that the transportation lane of the coal mining face is completely preserved and left for the next coal mining face to be used as the return air lane. [0003] Gobside retaining belongs to the surrounding rock with large deformation, which is affected by the stress of tunneling and two mining operations (mining at this working face and mining at the next working face), and the mine pressure is severe, which is a complex systematic project. The main reasons for the failure of retaining entry and the difficulty of its widespread application are as follows: First, due to the lack of correct theoretical guidance, when designing support for retaining entry along the gob, it is believed that the higher the safety fact...
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IPC IPC(8): E21C41/16E21F1/00E21F15/00E21D15/02
Inventor 成云海姜福兴庞继禄郭信山张磊鑫
Owner 成云海