97 results about "WATER HAZARDS" patented technology

The invention discloses a water conservation method for overlying strata water flowing fracture main channel through ground horizontal directional drilling grouting and sealing, which is suitable forthe technical field of water resource conservation in coal mining and mine water damage prevention and control. The method includes the following steps: firstly obtaining development characteristic information of the mined height of the overlying strata water flowing fractured zone in a tested area under specific mining conditions; then according to the development characteristic information, determining the distribution range of an aquiclude area of the overlying strata water flowing fractured zone communication stratum corresponding to the water flowing fracture main channel in the tested area; lastly, after determining position and orientation of the water flowing fracture main channel, constructing horizontal directional drilling on the ground and grouting and sealing the water flowingfracture main channel, thereby achieving the goal of reducing water conductivity of the fracture and conserving groundwater resources. The water conservation method has the advantages of simple steps, reliable effect and strong practicability.

The present invention belongs to the coal mining geophysical prospecting technical field, relates to a transient electromagnetic stack advanced detection device and method, in particular, a coal mine underground roadway transient electromagnetic stack advanced detection device and method. According to the device and method of the invention, a probe is arranged in a borehole, so that the probe can be far away from interference sources such as metal machineries in a roadway, and therefore, the influence of the interference sources can be avoided; the hole drilling conditions of a coal mine tunneling face are fully utilized, so that inside-roadway coil emission and inside-borehole three-component receiving can be realized; and a receiving device can move towards a direction before the tunneling face, and therefore, various kinds of the interference of the metal machineries at the tunneling face can be avoided without affecting the tunneling work of a mine party, and the advanced detection data of a plurality of positions in the borehole can be subjected to stack processing, and processing results can be displayed, and thus, hidden water damage geological bodies before the tunneling face can be predicted at an extra long distance.

The invention discloses a prevention and treatment method for goaf water under condition of repeated mining of thick seam upper slices destructed by minitype coal mines. The method comprises the following steps: step 1, determining a target area of directional drilling; step 2, constructing a drilling field; step 3, detecting the goaf water-rich anomaly area of the roadway heading face by a transient electromagnetic method and a high-density direct current method; step 4, arranging conventional drilling holes in the roadway heading face for drilling verification, allowing roadway tunneling incase of no anomaly in drilling verification, and treating the goaf water by circulation of water exploitation-tunneling-water exploitation; step 5, performing treatment in case of gushing water in drilling in the process of drilling verification in step 4; step 6, performing treatment if the drainage volume of the conventional drilling holes of the heading face in step 5 tends to be stable for a long time. The goaf water is prevented and treated by combination of ground and downhole geophysical prospection-conventional drilling-directional drilling; advanced, efficient, safe, accurate, large drop and long-distance cut-off and diversion of the goaf water is achieved; and disaster caused by the goaf water is effectively treated.

The invention belongs to the technical field of coal mine early warning, and discloses a coal mine underground water prevention and control early warning system and method and application, and the method comprises the following steps: an advanced exploration and stope face water disaster prediction system carries out coal mine water-containing structure and water guide condition detection, and determines stope face water disaster prevention and control technical measures; the underground water dynamic monitoring system acquires and analyzes corresponding data of underground water by using the mining area hydrological dynamic monitoring system; the mine water source rapid discrimination system is based on existing mine data, adopts geophysical prospecting, drilling and geochemical prospecting methods to carry out testing, analysis and determination of mining area water chemical background characteristics, establishes a mining area water chemical database, establishes a discrimination model of water quality of different aquifers in a well field, and rapidly discriminates various water bursting sources. According to the method, mine water inrush prediction and early warning can be carried out in time, targeted water prevention and control measures can be taken in a targeted mode, and safe, economical and reasonable production of a mine and comprehensive utilization of water resources are guaranteed.

The invention relates to a prediction method for the dynamic growth height of a caving zone, and the method is suitable for height prediction of the caving zone of a large-mining-height working surface of a thick seam layer and is carried out under the condition that an immediate roof internally includes structural rock stratum. The method mainly comprises the following steps that a key layer is determined; the number of overburden layers is determined; when t1<tm', the key layer is positioned in a slit band, and a caving height is calculated to be H4; when tm'+1<ti, the structural rock stratum is positioned in the caving zone straightly, and a caving height is calculated to be H5; when ti+1<tj, the structural rock stratum is positioned in a bent sinking band, and a caving height is calculated to be H6; and when tj+1<tn, a height of the caving zone of a goaf in the total sinking period of the caving zone is calculated to be H7. According to the method, deadweight compressing performance and a time sequence of the caving zone and exploitation caused by that a caving space of the goaf is large are taken into consideration, dynamic distribution the caving zone is divided into four stages of analysis, calculation and prediction, the caving zone of the large-mining-height working surface can be reflected accurately, and basis is provided for support type selection, coal mining technology design, and top board flood damage control.

The invention provides a bed separation water damage prevention and control method for coal mining, and relates to the technical field of mine geology. The bed separation water damage prevention and control method for coal mining comprises the following steps that mining and geological parameters are acquired before coal mining; a directional drilling implementation area is designed before coal mining; directional drilling is implemented, and perforation is carried out; perforation grouting is carried out after perforation; hole sealing grouting is carried out after perforation grouting; an aquifer observation hole is implemented in the ground after directional drilling and hole sealing; coal mining is carried out, and drainage and supplementary grouting are carried out according to aquifer observation; and no bed separation water damage occurs after coal mining is completed. The method is simple and easy to implement; the influence on the environment is small; the mine water inflow can be reduced, the drainage burden is reduced, and the safety is higher; and the grouting slurry is lower in quantity and price, and the economy and the reasonability are achieved.

The invention discloses a method for evaluating the exploration and treatment effect of a floor limestone water disaster ground advanced area of a coal seam. The method comprises the following steps of evaluating a drilling track in a ground long-distance directional drilling construction process, and scoring all two-stage indexes according to the evaluation standard; according to whether a drilled stratum has structural development or not, correspondingly selecting the evaluation standard of a normal stratum or an abnormal stratum, evaluating a drilling exploration result, and scoring all the two-stage indexes according to the evaluation standard; evaluating the grouting treatment effect, and scoring all the two-stage indexes according to the evaluation standard; and according to scoring results of three sub-items, calculating the sum of weight values corresponding to all evaluation item indexes according to the evaluation index calculation standard to obtain a comprehensive score of the treatment effect, and determining the quality grade of the exploration and treatment engineering effect of the floor limestone water disaster ground advanced area according to the comprehensive score and an evaluation grade table. The method is wide in application range and can comprehensively reflect the actual treatment engineering effect.

The invention provides a curtain closure method for a submersible aquifer dotted vertical water guiding channel. The curtain closure method comprises the following steps of: drilling holes: drilling aplurality of holes within a preset radius range around the dotted vertical water guiding channel, and after the centers of the plurality of holes are connected, surrounding the dotted vertical waterguiding channel in connection lines; and grouting: injecting mortar into the holes, and after the mortar is solidified, obtaining an anti-seepage curtain. According to the above scheme provided by theinvention, an entrapment type curtain body is constructed around the aquifer dotted vertical water guiding channel so as to cut off a submersible aquifer supply water source, a mine water inflow is reduced, water disaster hidden dangers are eliminated, and meanwhile, cost input is greatly saved.

The invention relates to a method for inhibiting mining damage depth based on clay-based slurry advanced grouting modified floor hard rock. The method starts from reducing or inhibiting damage depth or range of mining disturbance to a coal seam floor on the premise of not changing a coal mining process, advanced fracturing is conducted on a rock stratum with a certain layer position and thicknesswithin an original mining damage range through a ground or underground horizontal directional drill, penetration of a fracture network in the rock stratum is achieved, then clay-based slurry is injected into the penetration fracture network, the original rock stratum is modified into a clay flexible stratum, the flexible stratum can buffer vertical transmission of advance supporting pressure in afloor rock stratum in the mining process, so that the floor damage depth or range is restrained or reduced, and the purpose of preventing and treating water damage of the coal mine floor is achieved.

The invention relates to a river-side coal mine old goaf water disaster inspection and treatment integrated treatment method. The method comprises the following steps that a waterproof curtain inspection and treatment exploration line is arranged between an earth surface river and a mine area boundary, and the waterproof curtain inspection and treatment exploration line passes through an underground goaf in a to-be-treated mine area; in the exploration drilling construction process on the waterproof curtain inspection and treatment exploration line, grouting plugging is conducted on the interior of an exploration drilling hole of an exposed goaf, a curtain wall grouting section is formed, and the curtain wall grouting section and a solid stratum section jointly form a waterproof curtain wall. By constructing the curtain wall, supply of surface rivers to the old goaf is effectively isolated, the threat of shallow water to mine mining is relieved, the construction period is short, the cost is low, and the blocking effect is good.

The invention discloses a method for identifying bed separation water inrush. The method comprises the following steps of determining formation conditions of a coal seam roof bed separation water inrush process; classifying the bed separation water disasters by combining a bed separation water inrush mechanism and water inrush characteristics; and carrying out possibility analysis on the mining area bed separation water inrush. The exploitation coal seam roof bed separation water inrush is a dynamic process, the formation, development and final end of the coal seam roof bed separation water inrush are roughly subjected to three stages of bed separation space formation, bed separation space water accumulation and bed separation water inrush, the formation conditions of each stage are researched and analyzed, and bed separation water disasters are classified by combining the bed separation water inrush mechanism and the water inrush characteristics; and bed separation water inrush possibility analysis is carried out according to the formation condition of each stage and the rock stratum lithology of a mining area.

The invention relates to the technical field of mineral exploitation, in particular to a degradation effect control method for weak-cementation strong-expansion high-water-rich soft rock. The method comprises the following steps that drainage is conducted in the tunneling working process; top plate water spraying, bottom plate water seepage and production water are managed in the production process, and water is prevented from making contact with rocks; and reinforced support is carried out on a roadway. By means of massive water prevention and control, small water volume management and reinforced support as well as cooperative management of massive water prevention and control, small water volume management and reinforced support, the water yield condition of a stratum and the water catchment time condition of a separation space can be changed through massive water prevention and control, the source treatment effect is obvious, water disasters are avoided, and then the coal mining efficiency is improved; and through small water volume prevention and control, a tunneling working face is not troubled by water any more, the tunneling working face does not return to a rear way for repair during tunneling, and the monthly tunneling footage is stably improved under the condition that the mechanization degree is not obviously improved. The deformation of the roadway is effectively controlled through reinforced support and collaborative management.

The invention discloses an advanced treatment method and system for a collapse column based on a laminated multi-branch horizontal well. After the position of the karst collapse column is determined, a karst collapse column fracture area is selected in advance, a water stop plug with a sufficient range and a sufficient thickness is precisely built between a karst water filling water source and a to-be-stoped coal seam by adopting the laminated multi-branch horizontal well, the connection between high-pressure karst water and the stoped coal seam is blocked, and the water inrush threat is eliminated. The advanced treatment of the karst collapse column is a beneficial attempt for changing the passive reason of collapse column water disaster treatment into the active reason, and technical support is provided for building a coal mine water prevention and control intrinsic safety type mine.

The invention belongs to the technical field of hydrological monitoring, and discloses a mine underground water dynamic monitoring system, a control method and application. A monitoring computer is connected to an intelligent water level remote sensing instrument through a remote communication adapter, and the intelligent water level remote sensing instrument is installed in a field hydrological observation hole. According to the mine underground water dynamic monitoring system, the control method and the application, through research and application of a comprehensive mine water disaster prevention and control technology, a mine water chemical laboratory and an automatic real-time monitoring system for water conditions above and below the mine are established, a rapid water inrush source judgment system and a prevention and control key technology system suitable for mine area water disaster characteristics are formed, mine water inrush prediction and early warning are carried out in time, the method has important guiding significance on mine water prevention and control work, safe production and construction of a mine are guaranteed, a reference function is provided for the surrounding mine water prevention and control work with similar hydrogeological conditions, coal mine water inrush risk evaluation and control technology system construction are completed, a mine water source rapid judgment and mine underground water dynamic monitoring system and emergency mechanism linkage system is formed, and a mining area water prevention and control comprehensive management system is perfected.

The invention relates to a goaf grouting treatment method for secondary mining of an old goaf of an extra-thick coal seam. The method comprises the following steps: step 1, determining a plane boundary of a re-mining area; 2, calculating and determining a re-mining treatment vertical boundary; 3, determining the layout mode of ground directional drilling and underground drainage drilling, the probing layer position, the horizontal distance, the construction sequence and the drilling structure requirement; 4, parameters such as grouting materials, pressure, ending standards, grouting sequences and cooperation of grouting and drilling under different working conditions are determined; and 5, checking and reinforcing the grouting filling effect. The method effectively solves the problem of safe and efficient mining of multiple disasters such as water disasters, fire areas, harmful gases and broken roofs confronted by re-mining of residual coal in the extra-thick coal seam in a non-standard mining mode in the prior art, good effects of multi-disaster-source disaster control, space filling and coal rock consolidation in a re-mining area are achieved, and favorable conditions for safe mining are created for re-mining of residual coal in the extra-thick coal seam.

The invention relates to a coal seam roof aquifer ground advanced pre-drainage method. The method comprises the steps that a ground multi-branch updip horizontal well is constructed, and each branch hole of the updip horizontal well penetrates through an enriched water area of a roof aquifer; a large-diameter drainage well leading to the enriched water area of the roof aquifer is constructed, and the large-diameter drainage well is in communication with the updip horizontal well; and a drainage device is put into the large-diameter drainage well, and drainage treatment is conducted through the drainage device. The method can overcome the defects of the existing coal seam roof water disaster treatment technology, can completely remove hidden dangers of the coal seam roof aquifer to be mined before a regional coal mine is not well-built, guarantees that no roof water disaster influence exists in the whole coal mine from well building to well shut-in, and realizes safe, efficient and continuous coal seam mining.

The invention discloses a coal mine old goaf water inrush monitoring and judging method, and relates to the field of coal mine old goaf water disaster monitoring. Due to the influence of mining, a plastic failure area, namely a top plate water flowing fissure zone and a bottom plate failure zone (the depth is marked as h1) is developed in a certain range of a top plate and a bottom plate of the old goaf; when a finished rock stratum (an effective water-resisting layer, the thickness of which is recorded as h) between a roof water-guiding fissure zone (the height is recorded as h2) generated during mining of a coal seam below an old goaf and a bottom plate failure zone of an overlying old goaf is thin, under the action of an overlying rock mass and the water pressure of the old goaf, the effective water-resisting layer possibly generates plastic failure, a water-guiding channel is formed, and the water-guiding fissure zone is prevented from falling off. Therefore, accumulated water in the top old goaf enters the mining working face of the lower coal seam to cause a water inrush accident. The effective water-resisting layer of the roof old goaf may be subjected to shear failure or tension failure, so that a comprehensive criterion is formulated, whether the risk of water inrush exists or not can be visually seen, and precursor information of water inrush can be reflected.

The embodiment of the invention discloses a method for determining a directional drilling grouting layer position of a coal seam floor confined aquifer, and belongs to the field of mine water damage prevention and control. Parting the water-bearing and water-resisting layer structures of the coal seam floor, and determining the distribution condition of the main water-bearing layer on the coal seam floor; performing aquifer integrity coefficient calculation and evaluation on the determined main aquifer, and selecting the aquifer with deposition continuity and stability as a pre-selected grouting target layer; obtaining the mining damage depth Cp of the bottom plate and the water blocking coefficients zi of different lithologic rock strata of the bottom plate; calculating and evaluating thewater-resisting layer and water pressure elements of the pre-selected grouting target layer, and preliminarily determining a directional drilling grouting layer position; testing and evaluating the hydraulic relationship between the pre-selected grouting target layers; and comprehensively determining the directional drilling grouting horizon according to the preliminarily determined directional drilling grouting horizon and the obtained interlayer hydraulic relationship. And a better directional drilling grouting layer position can be conveniently and reliably determined, so that the effect of treating water disasters in a directional drilling area can be improved.

The invention discloses a method for evaluating the degree of influence of a coal mining work surface on shallow groundwater, which comprises the following steps of: monitoring shallow groundwater level drop depth and surface subsidence in a recovery process, obtaining dynamic change data of groundwater level and surface subsidence, analyzing a relationship between the groundwater level drop depth and the surface subsidence; and determining the influence level of mining on underground water. The method is novel, the steps of the method are simple, the evaluation method can be provided for the influence of stoping of the coal face on shallow groundwater, the coal face can be designed according to the evaluation result, water-preserved coal mining is achieved, and water damage accidents can be effectively predicted.

The invention relates to the technical field of coal seam floor damage depth monitoring, and provides a mining coal seam floor damage depth monitoring method which comprises the following steps: determining a water guide damage zone according to fracture development conditions and water guide properties before and after coal seam floor recovery, and determining a stress-strain zone according to strain change conditions before and after coal seam floor recovery, determining a physical property difference zone according to the physical property change condition before and after the coal seam floor is stoped; and monitoring the damage depth of the coal seam floor during mining according to the water diversion damage zone, the stress-strain zone and the physical property difference zone. The coal seam floor can be divided into a water guide failure zone, a stress-strain zone and a physical property difference zone through a point-line-plane full-space and multi-parameter cooperative monitoring mode, the influence degree of the coal seam floor during mining can be analyzed, the failure condition of the coal seam floor can be monitored, and the coal seam floor can be protected from being damaged by the water guide failure zone, the stress-strain zone and the physical property difference zone. And scientific risk prediction, safety prediction and water disaster prevention and control schemes can be formulated.

The invention belongs to the field of mine water disaster prevention and control, and particularly relates to a grouting water disaster prevention and control method considering mining-induced fracture influence based on a close-distance coal seam repeated mining-induced working condition. The invention discusses a grouting water disaster prevention and control method when a close-range aquifer exists above an upper coal seam under the condition of two close-range coal seams, and aims to provide reference for water and sand prevention and control mining of a close-range coal seam group. A buffer layer is formed through presplitting to reduce the height of a water flowing fissure zone, and a water-resisting layer is formed through grouting, so that water disaster prevention and control under the condition of repeated mining of a close-distance coal seam are achieved.