Coal-pillar-free self-forming roadway balanced mining design method and system
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A design method and technology without coal pillars, applied in mining equipment, surface mining, earthwork drilling, etc., can solve the problems of design limitations, inability to scientifically and effectively compensate for the stress loss of the roadway facing surface, etc.
Inactive Publication Date: 2021-12-17
王琦
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[0004] (2) The design of roadway balance parameters (row spacing between supports, prestress that can be applied, etc.) is limited to the traditional suspension theory, which cannot scientifically and effectively compensate for the stress loss of the roadway free surface
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Embodiment 1
[0030] This embodiment provides a method for designing balanced mining of self-formed roadways without coal pillars, including:
[0031] Using the rock mass disintegration function equation, the rock mass disintegration coefficient is obtained;
[0032] Based on the rock mass disintegration coefficient, using the stope distension control equation, the top cut height that makes the stope reach the disintegration balance is obtained;
[0033] Using a series of indoor tests to obtain the coefficient of the cut surface, and compare the friction force of the cut surface to obtain the roof cut angle when the roof collapse resistance of the stope is the smallest;
[0034] Obtain the support balance parameters of the self-forming roadway, verify the top cutting height, the top cutting angle and the self-forming roadway support balance parameters, obtain the balanced mining design parameters, and finally form the balanced mining plan of the self-forming roadway without coal pillars.
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Embodiment 2
[0053] This embodiment provides a balanced mining design system for self-forming roadways without coal pillars, including:
[0054] The rock mass disintegration coefficient calculation module is used to obtain the rock mass disintegration coefficient by using the rock mass disintegration function equation;
[0055] The roof cutting height calculation module is used to obtain the roof cutting height for the stope to reach the breaking and swelling balance based on the rock mass breaking coefficient and using the stope breaking expansion control equation;
[0056] The roof cutting angle calculation module is used to obtain the friction coefficient between the roof strata, and the roof cutting angle when the roof caving resistance of the stope is the smallest is obtained by comparing the friction force of the cut surface;
[0057] Mining plan formation module, which is used to obtain the support balance parameters of the self-forming roadway, verify the top cutting height, angle ...
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Abstract
The invention discloses a coal-pillar-free self-forming roadway balanced mining design method and system. The method comprises the following steps of obtaining a rock mass fragmentation and expansion coefficient through a rock mass fragmentation and expansion function equation; based on the rock mass breaking and expanding coefficient, the roof cutting height enabling a stope to achieve breaking and expanding balance is obtained through a stope breaking and expanding control equation; a series of indoor tests are utilized to obtain roof stratum friction coefficients, and the roof cutting angle is obtained when the stope roof caving resistance is minimum through kerf surface friction comparison; and self-forming roadway support balance parameters are obtained, the roof cutting height, the roof cutting angle and the self-forming roadway support balance parameters are verified to obtain balance mining design parameters, and finally a coal-pillar-free self-forming roadway balance mining solution is formed. According to the coal-pillar-free self-forming roadway balanced mining design method and system, the breaking and expanding parameters, the top cutting parameters and the supporting parameters can be accurately calculated, and the accurate coal-pillar-free self-forming roadway balanced mining solution is formed.
Description
technical field [0001] The invention relates to the field of coal mining, in particular to a design method and system for balanced mining of self-formed lanes without coal pillars. Background technique [0002] Coal mining methods have undergone continuous changes, from the traditional coal pillar digging along the gob to the current self-contained roadway without coal pillars. The mining method of self-forming roadway without coal pillars is to use pre-splitting roof cutting to cut off the stress transfer between the goaf and the roadway, and to use the work of the cut rock mass and the characteristics of the rock mass to automatically fill the goaf to form a gravel roadway. This process cancels the roadway coal pillars and cancels the roadway excavation at the same time. However, there is no clear basis and method for the design of some parameters of this method. Specifically in: [0003] (1) The basis for the design of stope balance parameters is insufficient, includin...
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