Observation method of caving step distance in fully enclosed non-pedestrian roadway
A caving step, fully airtight technology, applied in the field of coal and gas co-mining, can solve the problem that the caving step cannot be tested, it is difficult to determine the advancing distance between the gas high-level mining roadway and the mining face, and the gas drainage concentration is difficult. To achieve satisfactory results and other issues, to achieve the effect of clear and intuitive observation results, safe and reliable implementation process, and improved gas drainage efficiency
Inactive Publication Date: 2015-10-21
XIAN UNIV OF SCI & TECH
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, in all mines in my country that use high-level gas drainage lanes to extract gas, since the two ends of the high-level gas drainage lanes are sealed during use, it is almost impossible to test the caving step of the roadway with the advancement of the working face. It is difficult to determine the relationship between the high-level gas drainage roadway and the advancing distance of the mining face, making it difficult to achieve a satisfactory gas drainage concentration
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0014] The present invention selects a fully-enclosed non-pedestrian gas drainage roadway arranged along the coal seam direction on the main coal seam roof of a certain high gas coal mine as the field test area. According to the calculation of the thickness of the mining coal seam, the collapse height of the overlying strata will not exceed 10m. Therefore, 10-15m is reserved for each measuring line 3 outside the closed wall of the test roadway. When the working face pushes through the high pumping roadway, due to the mine pressure, the roof of the test roadway gradually bends and sinks or even collapses suddenly. Caving and moving down, so that the free end of the measuring line outside the closed wall will have a corresponding displacement, so as to test the caving step of the roadway.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to the field of coal and gas simultaneous extraction, particularly to a method for observing caving steps of fully-enclosed non-pedestrian roadways. A measuring line straightening device and an automatic measuring line expansion length recording device are included. Test of the caving steps of the fully-enclosed non-pedestrian roadways is achieved through mutual matching of the devices. Through the method, the caving steps of the closed roadways advanced along with working faces and sinkages of roadway roofs can be observed outside roadway closed walls, and relations between the fully-enclosed non-pedestrian roadways and roof weighting steps of the working faces are effectively disclosed. Observation results are clear and intuitive, and the implementation process is safe and reliable. According to the method, the problem of test of the caving steps of the fully-enclosed non-pedestrian roadways is solved, a method is provided for further testing the caving steps of high-level gas extraction roadways arranged along directions (inclinations) of coal seam roofs, the evidence is provided for determining levels of high-level gas drainage roadways arranged along directions (inclinations) of the coal seam roofs, and the method has significance in improving the gas extraction efficiency.
Description
technical field [0001] The invention relates to the field of co-mining of coal and gas, in particular to a method for testing the roof caving step distance of a fully enclosed non-pedestrian roadway. This method is applicable to the observation of the collapse step distance of the fully enclosed non-pedestrian roadway arranged for gas drainage as the working face advances during the coal mine production process, and further clarifies the relationship between the roadway collapse and the working face cycle pressure step distance The relationship provides theoretical guidance for the determination of relevant parameters and maintenance methods of fully enclosed non-pedestrian roadways. Background technique [0002] At present, the mine gas disaster is still one of the accidents restricting the safety production of coal mines in my country. At the same time, the gas is also the source of atmospheric environmental pollution such as causing the greenhouse effect and destroying th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01B5/14G01B5/02
Inventor 李树刚林海飞王红刚潘红宇赵鹏翔成连华魏宗勇王红胜李莉丁洋张天军
Owner XIAN UNIV OF SCI & TECH