Calculation method of ground surface residual subsidence coefficient of longwall mining
A coefficient calculation and residual technology, applied in the field of longwall mining surface residual subsidence coefficient calculation, can solve problems such as wrong results of construction site stability evaluation, invalid land reclamation planning and design, overestimation of residual subsidence, etc., to achieve The calculation results are satisfactory, the reliability is high, and the effect of maintaining continuity
Active Publication Date: 2018-10-12
CHINA UNIV OF MINING & TECH (BEIJING)
View PDF10 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
It shows that applying formula (1) to calculate the residual subsidence coefficient of the surface will lead to significant errors, and there is a phenomenon of overestimating the residual subsidence, which may lead to errors in the evaluation results of the stability of the surface building site in the old goaf and the failure of land reclamation planning and design
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 Construction
[0020] The present invention proposes a method for calculating the surface residual subsidence coefficient of longwall mining, and the present invention will be further described in detail below in conjunction with specific embodiments.
[0021] The present invention proposes a method for calculating the surface residual subsidence coefficient of longwall mining, the method comprising the following steps:
[0022] 1) Determine the limit residual subsidence coefficient of longwall mining;
[0023] Underground coal seam longwall caving mining is due to the existence of caving rock fragmentation and separation cracks, etc., resulting in surface subsidence less than the mining thickness of the coal seam. With the advancement of the mining face, when the distance from the coal wall to the goaf reaches the average mining depth of 0.12 to 0.6, the caving rock in the goaf is in a stable pressure zone. At this time, the breaking expansion coefficient of the caving rock is called is th...
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 provides a calculation method of a ground surface residual subsidence coefficient of longwall mining, and belongs to the fields of mine mining subsidence prediction in the mining engineering field, mining area land reclamation planning design and old-goaf ground surface construction site stability evaluation. According to the method, an expression of an annual residual subsidence coefficient in ground surface residual subsidence continuation time is constructed on the basis of constraint conditions that the sum of all annual residual subsidence coefficients in the ground surfaceresidual subsidence continuation time is equal to a ground surface limit residual subsidence coefficient, and an initial annual residual subsidence coefficient is large and linearly attenuated, a ground surface residual subsidence coefficient of any year in the ground surface residual subsidence continuation time, a cumulative residual subsidence coefficient to a certain year and a cumulative residual subsidence coefficient generated in the future after a certain year are calculated and obtained, and the residual subsidence coefficient can be converted into corresponding ground surface residual subsidence quantity. According to the method, an objective quantitative basis can be provided for stability and suitability evaluation of mining area land reclamation, ecological environment planning design and use of an old-goaf ground surface as a construction site, and an application value is high.
Description
technical field [0001] The invention belongs to the fields of mine mining subsidence prediction, land reclamation planning and design in mining areas, and field stability evaluation of old goaf surface construction sites in the field of mining engineering, and specifically relates to a calculation method for longwall mining surface residual subsidence coefficients to determine The residual surface subsidence of a certain year within the duration of the residual surface subsidence, the cumulative residual surface subsidence in the past, and the potential residual surface subsidence in the future. Background technique [0002] The entire time from the beginning to the end of the surface movement and deformation caused by underground coal longwall mining is defined as the surface movement duration. When the subsidence of the surface point reaches 10mm, it is the start time of the surface movement duration. When the cumulative subsidence does not exceed 30mm for 6 consecutive mo...
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 IPC IPC(8): G06F17/10
CPCG06F17/10
Inventor 崔希民赵玉玲
Owner CHINA UNIV OF MINING & TECH (BEIJING)