PL159795B1 - Method of making yieldable safety pillars under circumstances of crump hazard - Google Patents

Abstract

A method for obtaining flexibility of support pillars in bump hazard conditions, involving their being split using excavation headings into pillars, characterized in that flexibilityis obtained in separated blocks with uniform rock bump susceptibility and uniform seismicity of adjacent areas of abandoned workings, starting preferably with blocks where the hazard is greatest and proceeding successively to blocks with low bump hazard, by leading a flexibility split from the border line between the blocks to a distance of 150 to 200 m if the bump energetic index for the rock constituting a block Wet > 5 and seismicity of the abandoned headings adjacent to the block As > 10<6> J/ha, 200 to 350 m if the bump energetic index for the rock constituting a block 3 < Wet =< 5 and seismicity of the abandoned headings adjacent to the block As = 10<5> - 10<6> J/ha, and up to 800 m if the bump energetic index for the rock constituting a block Wet =< 3 and seismicity of the abandoned headings adjacent to the block As < 10<5> J/ha, while on the border of the blocks reverse split working to obtain flexibility is conducted, to a distance of up to 80 m from the border line between the blocks.<IMAGE>

Description

The subject of the invention is a method of dropping fire in resistance under conditions of a rock burst hazard. The known method of making the fUr ^ in resistance in conditions of a risk of rock bursts presented in the Polish patent description P-259 907 consists in cutting the entire body of the resistance fUr into fHars with dimensions securing their operation in the post-destruction phase by carrying out simulating works along the entire length a thrust pillar from a safe body The disadvantage of such a way of carrying out the work of the pillar is that such works take a long time, leading to the weakening of the ceiling, disturbance of the sides and the floor of the floor, which significantly increases the risk of a collapse and may lead to failure to select the collapsed plots of the supporting pillar. Conducting similar works in the last phase when reaching the part of the thrust pillar, which is surrounded by goaf three-way / the most endangered area due to rock bursts! may cause the unfusible part of the thrust filler to crack, which acts as the unselected and unfused bed residue in the vicinity of the goaf.

^The wraps ^p rzedstawionego mentioned method upodatniania filerów O ^p p ^p is removed orowych of the invention. Summary of the Invention ^p olega that upodatniroie ^p rowadzi EIE in separate blocks, characterized by the same tendency of rock ^d bumps and uniform seismic ^p y ^y ległych regions

159 795 goaf, starting preferably from the blocks with the highest risk and passing successively ^D blocks miiejszym danger of rock burst leading rozcinkę upodatnhjącą from the line ^g ranicznej ^ between the blocks at a distance, which is 150 to 200 m for the indicator energy tąpliwości rock deposit ⁱⁿ the block. > 5 and aMywności seismic ^p y ^y ległych block regions gobs ^a fl> ¹⁰ J / ha ²⁰ 0 ^d of 350 m <ila ratio of the energy tąpliwo ^TARGET rock deposit in Moku 3 R * 5 and seismic activity adjacent to the block areas of gobs k = _g ^ 10 - 10θ J / ha to 800 m for ^the Shutdown ejnergetycznego tąpliwom reservoir rocks in Moku ^W e ^^ 3 and seismic areas adjacent to Moku gobs Αθ CIO ^ ^J / ha at the block boundary is performed retrospectively rozcinkowe ro ^b gold upodatniające a distance of 80 m from the line ^g ranicznej between blocks.

Wyn object lazku jeat described in ^Getting canine ^d bad embodiment rob ^yellow background in the water treatment plant and ^p fibrze resistance produced at rysunltu, Mory shows a Ory ^g for upodatniany pillar of ^p orowy.

^In one abutment pillar isolated block ^2, there is the greatest for Mórym ^g Ro ^of up rock burst ^g d ^Y of W = 6 and aktwnoaó seismic ^p y ^y ległych reβ u * 7 goaf ions is A_ = ^{10 J} / ha, Mok 3 in Mórym risk tąpa9 therewith is the One ^g dyz I. = ^4, and aMywność seismic ^p y ^y ległych regions goaf _fl = A ¹ 0 ^JJ / ha and block 4 in a Mórym ^g Ro ^of up rock burst is low ^g f d ^y W_. And 2.5 * ^Getting activity seismic areas ległych goaf Αθ = 10 ^{4 J} / ha. Conducting ^bot ro upodatniających begins Moku ² simultaneously performing backward ronty upodatniające in Moku 3 ⁷ 0 at a distance m from the edge me ^e Mokami between ² and 3 works in upodatniające Moku ² and the back-wytonywane block ^{3 p} olegają to separation by means of the excavation drift / straps and komsi ^ / ¹ pillars I ^Ed zykomorow ^y ch measuring ustalanycn indium ^y ally for Mżdego block depending on ^db u ^d o ^y and wytrzyrołosci rock reservoir and surrounding the deposit, visual observations of the behavior of rocks surrounding is learned made in block wyrotjiska 5 and the size ^TARGET settling caprock ^y c ^h uplift rocks are ^{p-reacted y} ch and horizontal deformation filrrów 6 separate wyroMskami 5 in Merunku pits 5 so as to radiate upodatnia ciently fitory interventricular undergo deformation tir / ałym while maintaining their podporności preventing excessive bending of the roof rocks, causing the formation of roof collapses or excessive uplift of the floor.

After immersion ro ^Bot upodatniających in Moku ² and the back-EXEC ^y wan ^y ch rob ^ot upodatniających in Ijloku 3 ^Getting atępuje aie to Mntynuowania yet in Moku ³ and tiloku 4 robM upodatniającyrt, More in block 3 is carried out from the border line between Mokami ² and 3 at a distance of 300 m, which corresponds to the length ^of the third of tiloku while the leg 4 is carried out works at a distance rt upodatniające ⁵ ° 0 m from the border line between blocks me ^e 2 and 4

Mzedstawiony in ^Getting puts the method conducting ro ^bó background processing plants allows szyMie them carried out with the liquidation of the most vulnerable areas of the pillar abutment in kolejnoni of areas most of ^a ~ grożonych to areas of rniiejszyrn zagrożniu allowing the lead nastopnej sequence ^TARGET rortt operating in fitorze conditions clearance ^y ^ ch to a orenia rock burst.

159 795

Department of Publishing of the UP RP. Circulation of 90 copies. Price: PLN 10,000

Claims (1)

Patent claims The method of pitting retaining pillars in the event of a rock burst hazard, consisting in cutting them into pillars with paving workings, characterized in that the paving is carried out in separate blocks characterized by the same rock tendency to rock bursts and the same seismic activity in the adjacent goaf regions, preferably starting from the blocks with the largest risk and going successively to blocks with the lowest rock burst risk, leading the expansion section from the boundary line between the blocks to a distance of 150 to 200 m, for the rock burst energy index of complex rocks in block Wet> 5 and seismic activity adjacent to the block of goaf regions A ₀ > 10 ° J / ha, 200 to 350 m for the rock burst energy index of complex rocks in block 3 <W_ + 5 1 of seismic activity of the goaf regions adjacent to the block A = 10 - 10 J / ha and up to 800 m for the rock burst energy index in block Γ, 3 and of seismic activity adjacent to the block of goaf regions A ₀ <10 J / ha, while at the block boundary, retrograde expansion works are performed up to 80 m from the boundary line between blocks.