Classification Method for Balanced Arch Structure of Mined Rock Mass
A technology of arched structure and classification method, which is applied in surface mining, earthwork drilling, underground mining, etc., can solve problems such as difficult research, complex problems, and disconnected surface movement rules, so as to improve the initial mining rate and improve construction safety. Effect
Active Publication Date: 2019-01-29
CHINA UNIV OF MINING & TECH (BEIJING)
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] Mining subsidence is related to more than 10 geological and mining change factors, and the problems are complex and difficult to study
There are still some problems in the description of the relationship between mining subsidence and geological mining conditions: 1) The description of rock formation failure is out of touch with the law of surface movement, and the description of continuous basins in surface movement is out of touch with the description of surface cracks and steps; 2) The "three zones" of rock formation movement describe deformation The degree of zoning characteristics, some conditions are described as "three zones" but incomplete and inappropriate; 3) The adequacy of mining is a description of the degree of lateral mining on the surface, and the relationship between the adequacy of mining and the movement of rock formations is rarely studied. Few studies have been conducted on the influence of vertical mining degree and the interaction between vertical and horizontal mining degree on rock formation and surface
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
[0047] In order to clearly illustrate the solutions in the present invention, preferred embodiments are given below and detailed descriptions are given in conjunction with the accompanying drawings.
[0048] In view of the fact that in the process of coal mining, excavation disturbances cause local rock mass stress imbalance, causing rock mass damage, damage, and deformation, accompanied by changes and redistribution of rock mass stress, and transmit, expand, and affect larger rock mass range until the stress reaches a new balance, thus forming an excavation disturbance zone for rock formation stress changes and deformations, and from figure 1 and figure 2 It can be seen from the figure that the boundaries of the "three zones" of rock strata movement are not clear, and there are even no bending zones under the condition of thin bedrock. Mining subsidence has the problem of rock mass structure effect, and the "three zones" (caving zone, crack zone, and bending zone) of rock s...
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 discloses a method for classifying mining rock mass balance arch structures. The method comprises the following steps: (1) carrying out geological survey on a mining area, obtaining information of stratum medium characteristics, occurrence sizes and a geological structure of the mining area and obtaining an initial structure of an original rock of the mining area; (2) determining mining factors of the mining area; (3) determining a critical arch height h0 of a main rock arch and a critical arch height h0 of a secondary rock arch of overlying strata according to the initial structure of the original rock and the mining factors of the mining area; (4) judging the formation or fracture condition of a rock arch according to the critical arch height h'0 of the main rock arch and the critical arch height h'0 of the secondary rock arch; and (5) determining the types of the mining balance arch structure of the overlying strata according to the formation or fracture condition of the rock arch and determining a mining balance arch structure mode of the overlying strata in different states. A two-way evaluation mode of the horizontal mining degree and the vertical mining degree is fused, and a comprehensive influence relation-based mining subsidence evaluation system is constructed.
Description
technical field [0001] The invention relates to the field of coal mining, in particular to a method for classifying balanced arched structures of mining rock mass. Background technique [0002] Mining subsidence is related to more than 10 geological and mining change factors, which are complex and difficult to study. There are still some problems in the description of the relationship between mining subsidence and geological mining conditions: 1) The description of rock formation failure is out of touch with the law of surface movement, and the description of continuous basins in surface movement is out of touch with the description of surface cracks and steps; 2) The "three zones" of rock formation movement describe deformation The degree of zoning characteristics, some conditions are described as "three zones" but incomplete and inappropriate; 3) The adequacy of mining is a description of the degree of lateral mining on the surface, and the relationship between the adequac...
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 & AuthorityPatents(China)
IPC IPC(8): E21C41/18
CPCE21C41/18
Inventor戴华阳
OwnerCHINA UNIV OF MINING & TECH (BEIJING)