Method for relieving stope mine pressure based on key layer reconstruction principle
A key layer and rock pressure technology, applied in ground mining, mining equipment, underground mining, etc., can solve the problems of frequent mine pressure accidents in the stope
Active Publication Date: 2021-09-14
SHANDONG UNIV OF SCI & TECH
View PDF5 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] In order to solve the problem of frequent mine pressure accidents in the stope under the condition of no key layer stratum, the patent proposes a method for slowing down the mine pressure in the stope by rebuilding the key layer in view of the stratum condition where the key layer cannot be formed in the upper rock layer of the coal seam
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 1
[0122] The first step in site investigation and laboratory experiments
[0123] like Figure 4 Shown, the west of the field research ore mining a seam 1101 Face # 3, an average thickness of 4m, the thickness of the overburden to 35m of soft rock, the size of the face of 150m × 100m, rock breaking angle beta], taking 10 °; formation rotational angle θ, taking 20 °; critical layer re breaking length a, taking 14m; grouting loss coefficient λ, take 1.1; slurry filling rate ε, 0.75; seed slurry of m, 0.85; c per hour grouting , take 1500m 3 / H; grouting pipe diameters influence coefficient Δ, take 1.2 to 1.5.
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
| Property | Measurement | Unit |
|---|---|---|
| Uniaxial compressive strength | aaaaa | aaaaa |
| Uniaxial compressive strength | aaaaa | aaaaa |
| Uniaxial compressive strength | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a method for relieving stope mine pressure based on a key layer reconstruction principle. The method comprises the following steps that firstly, the geometric dimension of a reconstructed key layer is determined through theoretical calculation, the geometric dimension includes four parameters of inclination length, strike length, thickness and distance from a mining coal seam, and the thickness and the lithology difference of the coal seam are fully considered; a quantitative mutual feedback relation between the strength and the thickness of the key layer is established, a method for determining the strength and the thickness of the key layer is put forward from the perspective of ensuring that the key layer does not slip and lose stability, and quantitative design of a key layer reconstruction scheme is achieved; secondly, a key layer reconstruction field scheme is determined, a cross stepping bottom inverse grouting scheme is provided, parameters such as drill hole arrangement, drill hole reducing, grouting materials and grouting time are designed, and the scheme is reasonable in design and high in operability; and finally, key layer reconstruction construction processes including grouting time, procedures, labor organization and the like are determined.
Description
Technical field [0001] The present invention relates to the field of mine strata control pressure and, in particular, relates to a method of mining face mitigation layer based on the key principles of reconstruction. Background technique [0002] Coal underground mining of coal mining is carried out in a certain depth below the surface of the formation, transport activities, layered rock covered with nearly tens of meters or even kilometers on coal. Layered rock lithology, thickness, strength, chemical composition, etc. showed a larger difference. The mining subjects Pressure and Strata known control theory, the formation and rupture distribution rule is an important factor affecting the safety of coal mining, such as the presence of the following two cases: [0003] (1) When the upper strata in the seam there is one to several layers of large thickness, high strength hard rock, taken out with the continuous seam, the hard rock may occur regularly broken, and form a stable beam a...
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): E21C41/18E21D11/10G06F17/10
CPCE21C41/18E21D11/10G06F17/10
Inventor 张广超陶广哲李友左昊
Owner SHANDONG UNIV OF SCI & TECH
PatSnap Eureka turns technology decisions into work you can execute. Powered by our Innovation Knowledge Graph, it runs expert workflows across engineering, life sciences, materials and intellectual property. Get your review-ready output in minutes.
