Whole process control method for underneath passing goaf roadway division
A control method and goaf technology, which is applied in tunnels, mining equipment, earthwork drilling and mining, etc., can solve the problems that the roof goaf in front cannot be effectively controlled, and the roadway roof goaf cannot be managed.
Pending Publication Date: 2022-08-02
LUDONG UNIVERSITY +1
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- Application Information
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Problems solved by technology
[0005] 1. Before the roadway is excavated, it is impossible to effectively control the mined-out area of the roof in front;
[0006] 2. After the roadway is excavated, it is impossible to carry out feasible treatment of the goaf on the roof of the roadway
Method used
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[0032] The present invention will be described in detail below with reference to the accompanying drawings.
[0033] like figure 1 , 2 , 3 and 4, a method for controlling the whole process of a sub-section of a sub-gob that passes through a goaf specifically includes the following steps:
[0034] The first step is to use radar to detect the approximate position and size of the cavity in the front roof goaf on the roadway excavation working face, and use the drilling rig to drill the largest cavity within the range of the excavation footage to determine the distance between the cavity and the excavation working face. Distance L, use the cavity drilling 3D measurement system to measure the volume V of the cavity in the roof goaf;
[0035] The second step is to cast grouting holes in the goaf, install the grouting pipe 1, set the reverse blocker 10 at the front end of the grouting pipe 1, install the spring 6 on the reverse blocker 10, and install the grouting pipe 1 during the...
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The invention discloses an underneath passing goaf roadway division whole process control method which is characterized by comprising the following steps: detecting the size and the position of a cavity of a top plate in front of a roadway by using a geological radar and a drilling three-dimensional detector, grouting a cavity of a goaf in front by using a grouting pipe, ensuring the stability in the roadway tunneling process, and after the roadway tunneling, controlling the roadway to pass through the goaf. Supporting and secondary grouting are conducted on a roof through the resistance-increasing yielding grouting anchor cable, the stability of an underneath crossing goaf roadway is ensured, the stress value of a grouting pipe, the fracture change condition after grouting and the yielding amount of the resistance-increasing yielding grouting anchor cable are monitored, and the average stress rate of the grouting pipe, the yielding amount change rate of the resistance-increasing yielding grouting anchor cable and the roof fracture filling rate are calculated respectively; and a comprehensive evaluation value of the undercrossing goaf roadway of the goaf is established, the stability of the undercrossing goaf roadway is evaluated, and when the undercrossing goaf roadway is in a stable state, the roadway can be tunneled in the next cycle.
Description
technical field [0001] The invention relates to the technical field of underground engineering safety, in particular to a method for controlling the whole process of a sub-section of a tunnel going through a goaf. Background technique [0002] Coal resources are the pillar energy. However, years of coal mining have led to the depletion of shallow coal resources. After the upper layer coal is mined, the lower layer coal can be mined, which can solve the problem of insufficient coal mining reserves, reduce the waste of coal resources and prolong the mine production time. the goal of. [0003] After the upper layer of coal is mined, a goaf is formed. After the upper rock layer collapses, the loose and broken gangue fills the goaf. When the lower layer of coal is excavating the roadway, the roof of the roadway is a goaf, causing the broken rock on the roof of the roadway to fall, and the roof under the roof will fall. In severe cases, there will be a large range of roof fall, t...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E21D11/15E21D11/10E21D20/02E21F17/18
CPCE21D11/152E21D11/10E21D20/02E21F17/18
Inventor 王雷鹿伟宋克志孙会彬吴怡林蔺维南
Owner LUDONG UNIVERSITY