CN102116597B - Method for determining unit consumption of bench blasting explosive - Google Patents
Method for determining unit consumption of bench blasting explosive Download PDFInfo
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Abstract
The invention discloses a method for determining unit consumption of an bench blasting explosive, comprising the following steps: base number of unit consumption of an explosive is determined according to lithological characters, and then corresponding correction factors can be determined according to rock mass detrition degree, explosive performance, blast working conditions and blasting effect respectively, and finally, the unit consumption of the designed explosive is calculated. In the invention, the method is beneficial to rapid acquisition of reasonable unit consumption value of the explosive, avoids interference of artificial subjective factors in design, reduces design deviation of unit consumption of the explosive, and is beneficial to operation safety, improvement of blasting effect and control on construction cost.
Description
Technical field
The present invention designs the method that a kind of definite unit consumption of bench blasting explosive is determined, belongs to the engineering explosion technical field.
Background technology
Explosion 1m
3The explosive charge of the required usefulness of rock claims the unit volume explosive consumption, is called for short explosive specific charge, represents with q.Explosive specific charge is the techno economic parameter of most critical in the bench blasting, and it had both directly determined the size of other blasting parameter value, and remote-effects the height of blast working cost again, also finally affects the quality of demolition effect.
But for a long time, the blasting engineering technical staff determines that unit consumption of bench blasting explosive mainly adopts the empirical data method.Because the bursting work condition is different, influence factor is considered not comprehensive, and the flexibility that explosive specific charge is determined is very large, and lack science, never the computational methods of a cover science cause different engineers and technicians widely different to its value, and its value fluctuation range often reaches 20%～40%.In blasting engineering bid and budget, because the difference of explosive specific charge value causes the deviation of project quoted price and construction budget and final actual explosive specific charge very greatly different; Enter the blast working preparatory stage, because the definite inadequate science of explosive specific charge usually will spend for several times even the test of tens of separate explosion, just can reach desirable demolition effect; And enter the normal blast working stage, because can not be according to the change of explosion object, execution conditions, demolition effect etc., the timely also adjustment explosive specific charge of science not only causes serious quality and safety hidden danger, and causes the increase of blast working cost.For this reason, the method for seeking a kind of science and practical definite unit consumption of bench blasting explosive is very significant.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method of definite unit consumption of bench blasting explosive.
The object of the present invention is achieved like this, and a kind of method of definite unit consumption of bench blasting explosive is carried out as follows:
A, need to determine the kind of the rock of explosion, get the average fracture spacing of this kind and be the weak-weathered rock of 0.8m and do explosion bulge test, obtain first explosive consumption, obtain explosion 1m with first explosive consumption divided by the cubic number of getting rock
3The average fracture spacing of this kind rock is the consumption q of the required explosive of the weak-weathered rock of 0.8m
0
The condition of explosion bulge test is: the capacity for work that is used for the explosive of explosion is 285ml, the gradient height of explosion step is 10m, the big gun hole is vertical hole, segmentation short-delay blasting between the row of employing, the place ahead with no pressure quarrel of stair working face, the maximum blasting method that allows lumpiness to be of a size of 500mm or take heavy blasting;
B, need to determine the atmospheric disintegration of rocks degree of explosion, get under the condition of rock in step a of this kind rate of decay and carry out explosion bulge test, obtain the consumption of second explosive, obtain 1m with the consumption of second explosive divided by the cubic number of getting rock
3The consumption q of the explosive that the rock blasting of this kind rate of decay need to be used
1, use q
1/ q
0Obtain rate of decay to the influence coefficient k of unit consumption
1
C, determine execution conditions: determine the gradient height of construction step and the angle of boring, the average fracture spacing of getting the Rock Species that needs explosion is the weak-weathered rock of 0.8m, other conditions only change the angle in the ladder height of explosion step and big gun hole into the execution conditions of this separate explosion in not changing step a, carry out explosion bulge test, obtain the consumption of the 3rd explosive, obtain explosion 1m under these execution conditions with the consumption of the 3rd explosive divided by the cubic number of getting rock
3The consumption q of the explosive that the weak-weathered rock that average fracture spacing is 0.8m is required
2, use q
2/ q
0Obtain execution conditions to the influence coefficient k of unit consumption
2
D, determine the performance of explosive, the average fracture spacing of getting the Rock Species that needs explosion is the weak-weathered rock of 0.8m, only change explosive type and carry out explosion bulge test in the situation that do not change among the step a other conditions, obtain the consumption of the 4th explosive, obtain this kind explosive blasting 1m with the consumption of the 3rd explosive divided by the cubic number of getting rock
3Average fracture spacing is the expense q of weak-weathered rock institute of 0.8m
3, use q
3/ q
0Obtain explosive property to the influence coefficient k of unit consumption
3
E, determine the effect of explosion, the average fracture spacing of getting the Rock Species that needs explosion is the weak-weathered rock of 0.8m, only change demolition effect and test in the situation that do not change among a other conditions, obtain the consumption of the 5th explosive, obtain to reach the consumption q of the required explosive of this demolition effect with the consumption of the 3rd explosive divided by the cubic number of getting rock
4, use q
4/ q
0Obtain demolition effect to the influence coefficient k of unit consumption
4
F, determine the rendrock unit consumption, with explosion 1m
3The average fracture spacing of this kind rock is the consumption q of the required explosive of the weak-weathered rock of 0.8m
0Each the influence coefficient k that obtains with experiment
1, k
3, k
2And k
4Multiply each other and obtain the unit consumption of the required explosive of this separate explosion; It is unit consumption of bench blasting explosive
Q=k 1 K 2 K 3 K 4 Q 0
Described atmospheric disintegration of rocks degree and corresponding average fracture spacing value are: the completely decomposed rock, and average fracture spacing is less than or equal to 0.1m; Strong-weathered rock, average fracture spacing is greater than 0.1m and less than or equal to 0.5m; Weak-weathered rock, average fracture spacing is greater than 0.5 and less than or equal to 0.8m; Little decomposed rock, average fracture spacing is greater than 0.8 and less than or equal to 1.4m; Fresh rock, average fracture spacing is greater than 1.4m.
In step c, if take the mode of volley, k
2Actual value should be the k that obtains of experiment
2The value 1.1～1.2 times; If take sequentially to pursue between the hole mode of hole explosion, k
2Actual value should be the k that obtains of experiment
2The value 0.80～0.85 times; If take the mode of buffer blasting, the resulting k of first and second artillery salvo hole explosive specific charge
2Value will multiply by 1.2～1.3, and each row adopts the explosive specific charge of with no pressure quarrel explosion later on.
Beneficial effect of the present invention:
1, adopt the method for this patent to determine explosive specific charge, objectively embodied the various factors that affects explosive specific charge comprehensively, improved the science of bench blasting design, the interference of artificial subjective factor in avoiding designing is conducive to guarantee job safety and improves demolition effect.
2, because explosive specific charge is the principal element that affects blasting cost, the cost of explosive accounts for the over half of whole blast working cost usually, adopts the mode design deviation of traditional empirical estimating usually to reach more than 20%.Adopt the computational methods of this patent unit consumption of bench blasting explosive, can accomplish accurate quantification, design deviation is controlled within 5%, better controlled blasting cost and construction budget.
3, because this patent has provided the quantitative relationship between the various factors that affects explosive specific charge, so, if only have the factor of individual influences explosive specific charge to change, require to change such as Weathering Degree of Rock Mass change, explosive type change, bore angle change, explosion lumpiness, the unnecessary repeated multiple times blasting simulation test that carries out just can find rational explosive specific charge value fast.
The specific embodiment
1. rock medium is relevant with its character to the resistivity of blast action, and the fundamental property of rock basically is decided by the geology construction effect in its formation condition, mineralogical composition, Structural Tectonics state and later stage.Except the impact of later stage geology construction effect on explosive specific charge, rock property refers to mainly that on the impact of explosive specific charge the physical and mechanical property of rock is on its impact.Rock Species is different, and the physico-mechanical properties of rock is obviously different, and the required explosive specific charge of explosion is also obviously different; The unit weight of rock increases, and the ability of the intensity of rock and opposing blast action also increases, and fractured rock and mobile rock energy consumption also increase; Usually along with the raising of rock consolidating coefficient, explosive specific charge also increases.
Some kinds of the rock that we are common are: the coal seam that spoil is few, clay; Spoil multiple seam, mud stone, shale; Sandstone (shale, siliceous (quartziferous), calcareous); Limestone (shale (roe shape or leaf of bamboo shape), siliceous (densification)); Granite (flower hilllock conglomerate, coarse-grained granite, middle grain granite, granitello); Iron ore (iron ore of low ore grade, medium grade iron ore, high grade iron ore).
2. Weathering Degree of Rock Mass refers to rock mass loose degree of failure under the effect of geologic agent.In general, to the same rock, along with the increase of rate of decay, also educate all the more in the bedding crack, and the strength character of rock mass reduces larger, and the required explosive specific charge of explosion also obviously descends.The rate of decay of rock mass is divided into fresh rock, little decomposed rock, weak-weathered rock, strong-weathered rock, completely decomposed rock five classes usually.For characterizing quantitatively rate of decay to the impact of explosive specific charge, usually with the size in gap, the average crack of blasting face (m) as the quantitative target of further weighing rate of decay.
Described atmospheric disintegration of rocks degree and corresponding average fracture spacing value are: the completely decomposed rock, and average fracture spacing is less than or equal to 0.1m; Strong-weathered rock, average fracture spacing is greater than 0.1m and less than or equal to 0.5m; Weak-weathered rock, average fracture spacing is greater than 0.5 and less than or equal to 0.8m; Little decomposed rock, average fracture spacing is greater than 0.8 and less than or equal to 1.4m; Fresh rock, average fracture spacing is greater than 1.4m.
3. execution conditions are more to the influence factor of explosive specific charge, are summed up mainly to comprise following several factor: the one, and the impact of shoulder height.For the medium-length hole bench blasting, the step high-order is larger, and the clamping action of step bottom is stronger, and required explosive specific charge is corresponding will the raising also.The 2nd, the impact of boring factor.Usually the clamping action of vertical hole explosion is maximum, and angling hole takes second place.
4. exothermicity, at a high speed reaction, a large amount of gases of generation are three elements of explosive charge.The explosion property leading indicator of weighing commercial explosive comprises quick-fried heat, quick-fried appearance, quick-fried temperature, detonation pressure scheduling theory indicative parameter index, and the bursting property indexs such as explosion velocity, brisance, capacity for work, gap distance, also have the environmental protection indexs such as the safe performance indexes such as heat sensitivity, friction sensitivity, impact sensitivity and toxic gas content.Wherein capacity for work (quick-fried power) is main energy indexes, to having the greatest impact of explosive specific charge.
The type of explosive commonly used has:
1 on-site mixed explosive: the mixed loading emulsion explosive, porous particulated ammonium oil explosive, titania-mica;
2 packing explosives (2# rock type): emulsion, bulking ammonium nitrate explosive, modified ammonium nitrate-fuel oil explosive, powdery emulsifying explosive.
5. demolition effect affecting parameter and usually can allow lumpiness size (mm) and loosening or throwing to require to determine with maximum explosive specific charge.Loosening throwing requires to be subdivided into and weakens loosening, normal loosening, heavy blasting, weakens throwing, normal throwing, strengthens six types of throwings.
Embodiment 1
The bench blasting exploitation need be carried out in certain stock ground; rock is coarse-grained granite; rock mass is weak weathering; average fracture spacing is 0.6m, and rise of flight 12m adopts the vertical pore-creating of down-the-hole drill; adopt on-site mixed emulsion to carry out powder charge; adopt between the hole and sequentially carry out the explosion of with no pressure quarrel by the mode of hole explosion, the maximum lumpiness that allows is of a size of 750mm, and requires to adopt the mode of heavy blasting explosion so that the shovel dress.
A, need to determine the kind of the rock of explosion be coarse-grained granite, gets the average fracture spacing of coarse-grained granite and be the weak-weathered rock of 0.8m and do explosion bulge test, obtains first explosive consumption, measures explosion 1m with first explosive consumption divided by the side of this separate explosion
3The average fracture spacing of this kind rock is the consumption q of the required explosive of the weak-weathered rock of 0.8m
0Be 0.64kg/m
3
The condition of explosion bulge test is: the capacity for work that is used for the explosive of explosion is 285ml, the gradient height of explosion step is 10m, the big gun hole is vertical hole, segmentation short-delay blasting between the row of employing, the place ahead with no pressure quarrel of stair working face, the maximum blasting method that allows lumpiness to be of a size of 500mm or take heavy blasting;
B, determine that needing the atmospheric disintegration of rocks degree of explosion is weak weathering; average fracture spacing is 0.6m; get under the condition of coarse-grained granite in a of this kind rate of decay and carry out explosion bulge test, obtain the consumption of second explosive, measure 1m with the consumption of second explosive divided by the side of this separate explosion
3The consumption q of the explosive that the rock blasting of this kind rate of decay need to be used
1Be 0.576 kg/m
3, use q
1/ q
0Obtain rate of decay to the influence coefficient k of unit consumption
1Value is 0.9;
C, determine execution conditions: the gradient height of determining the construction step is angle 90 degree of 12m, boring; the average fracture spacing of getting coarse-grained granite is the weak-weathered rock of 0.8m; do not changing other conditions among a and only the angle in the ladder height of explosion step and big gun hole changed into the execution conditions of this separate explosion; carry out explosion bulge test; obtain the consumption of the 3rd explosive, measure explosion 1m under these execution conditions with the consumption of the 3rd explosive divided by the side of this separate explosion
3The consumption q of the explosive that the weak-weathered rock that average fracture spacing is 0.8m is required
2Be 0.672, use q
2/ q
0Obtain execution conditions to the influence coefficient k of unit consumption
2Value is 1.05;
Again because this is to adopt the mode of sequentially pursuing the hole explosion between the hole, i.e. k
2Value is 1.050.85=0.89
D, determine the performance of explosive; the explosive of this separate explosion is on-site mixed emulsion; getting the average fracture spacing of coarse-grained granite is the weak-weathered rock of 0.8m; only change explosive type and carry out explosion bulge test in the situation that do not change among a other conditions; obtain the consumption of the 4th explosive, measure this kind explosive blasting 1m with the consumption of the 4th explosive divided by the side of this separate explosion
3Average fracture spacing is the expense q of weak-weathered rock institute of 0.8m
3Be 0.736 kg/m
3, use q
3/ q
0Obtain explosive property to the influence coefficient k of unit consumption
3Value is 1.15;
E, the effect of determining explosion are the maximum blasting method that allows lumpiness to be of a size of 500mm or take heavy blasting; getting the average fracture spacing of coarse-grained granite is the weak-weathered rock of 0.8m; test in the situation that do not change among a other conditions; obtain the consumption of the 5th explosive, with the consumption of the 5th explosive divided by the consumption q that obtains reaching the required explosive of this demolition effect
4Be 0.576 kg/m
3, use q
4/ q
0Obtain demolition effect to the influence coefficient k of unit consumption
4Value is 0.9;
Calculate unit consumption of bench blasting explosive: q=k
1K
2K
3K
4Q
0=0.53kg/m
3
Embodiment 2
The bench blasting exploitation is carried out in certain iron ore mine, rock is middle grade iron ore, and the ore deposit rock is the gentle breeze rock mass, average fracture spacing is 1.3m, and rise of flight 12m adopts rotary drill pore-creating, bore angle is 70 °, adopt No. 2 rock emulsion explosives to carry out powder charge, sequentially carry out the explosion of with no pressure quarrel by the mode in hole between the hole between the row of employing, the maximum lumpiness that allows is of a size of 500mm.
A, need to determine the kind of the rock of explosion be middle grade iron ore, gets the average fracture spacing of middle grade iron ore and be the weak-weathered rock of 0.8m and do explosion bulge test, obtains first explosive consumption, measures explosion 1m with first explosive consumption divided by the side of this separate explosion
3The average fracture spacing of this kind rock is the consumption q of the required explosive of the weak-weathered rock of 0.8m
0Be 0.9kg/m
3
The condition of explosion bulge test is: the capacity for work that is used for the explosive of explosion is 285ml, the gradient height of explosion step is 10m, the big gun hole is vertical hole, segmentation short-delay blasting between the row of employing, the place ahead with no pressure quarrel of stair working face, the maximum blasting method that allows lumpiness to be of a size of 500mm or take heavy blasting;
B, determine that needing the atmospheric disintegration of rocks degree of explosion is gentle breeze, average fracture spacing is 1.3m, get under the condition of middle grade iron ore in a of this kind rate of decay and carry out explosion bulge test, obtain the consumption of second explosive, measure 1m with the consumption of second explosive divided by the side of this separate explosion
3The consumption q of the explosive that the rock blasting of this kind rate of decay need to be used
1Be 1.26kg/m
3, use q
1/ q
0Obtain rate of decay to the influence coefficient k of unit consumption
1Value is 1.4;
C, determine execution conditions: the gradient height of determining the construction step is angle 70 degree of 12m, boring, be averaged fracture spacing and be grade iron ore in the weak weathering of 0.8m, do not changing other conditions among a and only the angle in the ladder height of explosion step and big gun hole changed into the execution conditions of this separate explosion, carry out explosion bulge test, obtain the consumption of the 3rd explosive, measure explosion 1m under these execution conditions with the consumption of the 3rd explosive divided by the side of this separate explosion
3The consumption q of the explosive that the weak-weathered rock that average fracture spacing is 0.8m is required
2Be 0.9kg/m
3, use q
2/ q
0Obtain execution conditions to the influence coefficient k of unit consumption
2Value is 1.0;
Again because this is to adopt the mode of sequentially pursuing the hole explosion between the hole, k
2Actual value should be the k that obtains of experiment
2The value 0.80～0.85 times;
Be k
2Value is 1.0 * 0.8=0.8
D, determine the performance of explosive, the explosive of this separate explosion is No. 2 rock emulsion explosives, getting the average fracture spacing of middle grade iron ore is the weak-weathered rock of 0.8m, only explosive type is changed into No. 2 rock emulsion explosives and carry out explosion bulge test in the situation that do not change among a other conditions, obtain the consumption of the 4th explosive, measure this kind explosive blasting 1m with the consumption of the 4th explosive divided by the side of this separate explosion
3Average fracture spacing is the expense q of weak-weathered rock institute of 0.8m
3Be 0.936 kg/m
3, use q
3/ q
0Obtain explosive property to the influence coefficient k of unit consumption
3Value is 1.04;
E, the effect of determining explosion are of a size of 500mm for the maximum lumpiness that allows, getting the average fracture spacing of middle grade iron ore is the weak-weathered rock of 0.8m, test in the situation that do not change among a other conditions, obtain the consumption of the 5th explosive, measure the unit consumption q that needs reach the required explosive of this demolition effect with the consumption of the 5th explosive divided by the side of this separate explosion
4Be 0.576 kg/m
3, use q
4/ q
0Obtain demolition effect to the influence coefficient k of unit consumption
4Value is 0.9;
Calculate unit consumption of bench blasting explosive: q=k
1K
2K
3K
4Q
0=1.05kg/m
3
Embodiment 3
Certain airport engineering adopts blasting method to carry out levelling of the land, rock is calcareous sandstone, and is severely-weathered rock mass, and average fracture spacing is 0.3m, rise of flight 8m, adopt down-the-hole drill pore-creating, bore angle is 90 °, adopts the porous particulated ammonium oil explosive powder charge, limited by the place, dig quarrel equipment during explosion and can only do closely and withdraw, and require lumpiness to require to be not more than 1m, determine in this case rational explosive specific charge.
A, need to determine the kind of the rock of explosion be calcareous sandstone, gets the average fracture spacing of middle grade iron ore and be the weak-weathered rock of 0.8m and do explosion bulge test, obtains first explosive consumption, measures explosion 1m with first explosive consumption divided by the side of this separate explosion
3The average fracture spacing of this kind rock is the unit consumption q of the required explosive of the weak-weathered rock of 0.8m
0Be 0.68kg/m
3
The condition of explosion bulge test is the same with experimental condition in embodiment 1 and 2.
B, determine that needing the atmospheric disintegration of rocks degree of explosion is severely-weathered rock mass, average fracture spacing is 0.3m, get under the condition of calcareous sandstone in a of this kind rate of decay and carry out explosion bulge test, calculate the unit consumption q of the explosive that the rock blasting of this kind rate of decay need to use
1Be 0.63kg/m
3, use q
1/ q
0Obtain rate of decay to the influence coefficient k of unit consumption
1Value is 0.7;
C, determine execution conditions: the gradient height of determining the construction step is angle 90 degree of 8m, boring, being averaged fracture spacing is the weak weathering calcareous sandstone of 0.8m, do not changing other conditions among a and only the angle in the ladder height of explosion step and big gun hole changed into the execution conditions of this separate explosion, carry out explosion bulge test, obtain explosion 1m under these execution conditions
3The consumption q of the explosive that the weak-weathered rock that average fracture spacing is 0.8m is required
2Be 0.9kg/m
3, use q
2/ q
0Obtain execution conditions to the influence coefficient k of unit consumption
2Value is 1.0;
This separate explosion adopts the mode of buffer blasting, the resulting k of first and second artillery salvo hole explosive specific charge in addition
2Value will multiply by 1.2～1.3, and each row adopts the explosive specific charge of with no pressure quarrel explosion later on.
To the first artillery salvo hole k
2Value be k
2=1.3 * 1.0=1.3;
To the second artillery salvo hole k
2Value be k
2=1.2 * 1.0=1.2
To artillery salvo hole k after other
2Value be k
2=1.0
D, determine the performance of explosive, this separate explosion adopts porous particulated ammonium oil explosive, and getting the average fracture spacing of calcareous sandstone is the weak-weathered rock of 0.8m, only changes explosive type and carries out explosion bulge test in the situation that do not change among a other conditions, obtains this kind explosive blasting 1m
3Average fracture spacing is the required unit consumption q of weak-weathered rock of 0.8m
3Be 0.9 kg/m
3, use q
3/ q
0Obtain explosive property to the influence coefficient k of unit consumption
3Value is 1.0;
E, the effect of determining explosion are that lumpiness requires to be not more than 1m, getting the average fracture spacing of calcareous sandstone is the weak-weathered rock of 0.8m, only demolition effect is changed into lumpiness and require to be not more than 1m and test in the situation that do not change among a other conditions, obtain to reach the unit consumption q of the required explosive of this demolition effect
4Be 0.72kg/m
3, use q
4/ q
0Obtain demolition effect to the influence coefficient k of unit consumption
4Value is 0.8;
Calculate unit consumption of bench blasting explosive:
Q(the first artillery salvo hole)=0.7 * 1.0 * 1.3 * 0.8 * 0.68=0.5kg/m
3
Q(the second artillery salvo hole)=0.7 * 1.0 * 1.2 * 0.8 * 0.68=0.45kg/m
3
Q(the 3rd artillery salvo hole)=0.7 * 1.0 * 1.0 * 0.8 * 0.68=0.38kg/m
3
Embodiment 4
Blasting excavation is carried out in certain sandstone stock ground, and rock is flower hilllock conglomerate, and is the weak-weathered rock body, and average fracture spacing is 0.8m.Former blasting scheme is adopted and is rise of flight 10m, adopt down-the-hole drill pore-creating, bore angle is 90 °, adopts porous particulated ammonium oil explosive powder charge (capacity for work of explosive is 285ml), and the short-delay blasting mode is carried out the explosion of with no pressure quarrel between the row of employing, adopts 0.52kg/m in the practice
3Explosive specific charge can satisfy the maximum explosion requirement that allows lumpiness to be of a size of 500mm.For realizing the scale blasting excavation; intend adopting rotary drill to carry out pore-creating; shoulder height increases to 12m; bore angle is 80 °; and adopt on-site mixed explosive to carry out mechanized charging; other execution conditions, lithology condition, explosion require not change, and require further to determine the explosive specific charge of this bench blasting.
Because satisfying, former blasting scheme determines explosive specific charge q
0All experimental conditions, so q
0=0.52 kg/m
3, the adjustment of this blasting scheme only relates to k
2, k
3The adjustment of value at first obtains k through overtesting
2Value be 1.03; k
3Value be k
3=1.2;
Calculating unit consumption of bench blasting explosive is k
2K
3Q=0.52 * 1.03 * 1.2=0.64kg/m
3
Embodiment 5
Blasting excavation is carried out in certain sandstone stock ground, and rock is flower hilllock conglomerate, and is the gentle breeze rock mass, and average fracture spacing is 0.8m.Former blasting scheme is adopted and is to adopt down-the-hole drill pore-creating by rise of flight 8m, and bore angle is 90 °, adopts the porous particulated ammonium oil explosive powder charge, and the short-delay blasting mode is carried out the explosion of with no pressure quarrel between the row of employing, adopts 0.52kg/m in the practice
3Explosive specific charge (q) can satisfy the maximum explosion requirement that allows lumpiness to be of a size of 500mm.For realizing the scale blasting excavation; intend adopting rotary drill to carry out pore-creating; shoulder height increases to 12m; bore angle is 80 °; and adopt on-site mixed explosive to carry out mechanized charging; other execution conditions, lithology condition, explosion require not change, and require further to determine the explosive specific charge of this bench blasting.
Because q=0.52 kg/m
3, the adjustment of this blasting scheme only relates to k
2, k
3The adjustment of value.
C, determine execution conditions: the gradient height of determining the construction step is angle 90 degree of 12m, boring, being averaged fracture spacing is the weak weathering flower hilllock conglomerate of 0.8m, other conditions only change the angle in the ladder height of explosion step and big gun hole into the execution conditions of this separate explosion among the step a in not changing embodiment 1, carry out explosion bulge test, obtain explosion 1m under these execution conditions
3The consumption q of the explosive that the weak-weathered rock that average fracture spacing is 0.8m is required
2Be 0.53kg/m
3, use q
2/ q
0Obtain execution conditions to the influence coefficient k of unit consumption
2Value is 1.03;
D, determine the performance of explosive, this separate explosion adopts on-site mixed explosive to carry out mechanized charging, the average fracture spacing of getting flower hilllock conglomerate is the weak-weathered rock of 0.8m, in the situation that not in the Change Example 1 among the step a other conditions only change explosive type and carry out explosion bulge test, obtain this kind explosive blasting 1m
3Average fracture spacing is the expense q of weak-weathered rock institute of 0.8m
3Be 0.624 kg/m
3, use q
3/ q
0Obtain explosive property to the influence coefficient k of unit consumption
3Value is 1.2;
Calculating unit consumption of bench blasting explosive is k
2K
3Q=0.52 * 1.03 * 1.2=0.64kg/m
3
Claims (2)
1. the method for a definite unit consumption of bench blasting explosive is characterized in that carrying out as follows:
A, need to determine the kind of the rock of explosion, get the average fracture spacing of this kind and be the weak-weathered rock of 0.8m and do explosion bulge test, obtain first explosive consumption, obtain explosion 1m with first explosive consumption divided by the cubic number of getting rock
3The average fracture spacing of this kind rock is the consumption q of the required explosive of the weak-weathered rock of 0.8m
0
The condition of explosion bulge test is: the capacity for work that is used for the explosive of explosion is 285ml, the gradient height of explosion step is 10m, the big gun hole is vertical hole, segmentation short-delay blasting between the row of employing, the place ahead with no pressure quarrel of stair working face, the maximum blasting method that allows lumpiness to be of a size of 500mm or take heavy blasting;
B, need to determine the atmospheric disintegration of rocks degree of explosion, get under the condition of rock in step a of this kind rate of decay and carry out explosion bulge test, obtain the consumption of second explosive, obtain 1m with the consumption of second explosive divided by the cubic number of getting rock
3The consumption q of the explosive that the rock blasting of this kind rate of decay need to be used
1, use q
1/ q
0Obtain rate of decay to the influence coefficient k of unit consumption
1
C, determine execution conditions: determine the gradient height of construction step and the angle of boring, the average fracture spacing of getting the Rock Species that needs explosion is the weak-weathered rock of 0.8m, other conditions only change the angle in the ladder height of explosion step and big gun hole into the execution conditions of this separate explosion in not changing step a, carry out explosion bulge test, obtain the consumption of the 3rd explosive, obtain explosion 1m under these execution conditions with the consumption of the 3rd explosive divided by the cubic number of getting rock
3The consumption q of the explosive that the weak-weathered rock that average fracture spacing is 0.8m is required
2, use q
2/ q
0Obtain execution conditions to the influence coefficient k of unit consumption
2
D, determine the performance of explosive, the average fracture spacing of getting the Rock Species that needs explosion is the weak-weathered rock of 0.8m, only change explosive type and carry out explosion bulge test in the situation that do not change among the step a other conditions, obtain the consumption of the 4th explosive, obtain this kind explosive blasting 1m with the consumption of the 4th explosive divided by the cubic number of getting rock
3Average fracture spacing is the expense q of weak-weathered rock institute of 0.8m
3, use q
3/ q
0Obtain explosive property to the influence coefficient k of unit consumption
3
E, determine the effect of explosion, the average fracture spacing of getting the Rock Species that needs explosion is the weak-weathered rock of 0.8m, only change demolition effect and test in the situation that do not change among a other conditions, obtain the consumption of the 5th explosive, obtain to reach the consumption q of the required explosive of this demolition effect with the consumption of the 5th explosive divided by the cubic number of getting rock
4, use q
4/ q
0Obtain demolition effect to the influence coefficient k of unit consumption
4
F, determine the rendrock unit consumption, with explosion 1m
3The average fracture spacing of this kind rock is the consumption q of the required explosive of the weak-weathered rock of 0.8m
0Each the influence coefficient k that obtains with experiment
1, k
3, k
2And k
4Multiply each other and obtain the unit consumption of the required explosive of this separate explosion; It is unit consumption of bench blasting explosive
Q=k 1 K 2 K 3 K 4 Q 0
Described atmospheric disintegration of rocks degree and corresponding average fracture spacing value are: the completely decomposed rock, and average fracture spacing is less than or equal to 0.1m; Strong-weathered rock, average fracture spacing is greater than 0.1m and less than or equal to 0.5m; Weak-weathered rock, average fracture spacing is greater than 0.5 m and less than or equal to 0.8m; Little decomposed rock, average fracture spacing is greater than 0.8 m and less than or equal to 1.4m; Fresh rock, average fracture spacing is greater than 1.4m.
2. the method for described definite unit consumption of bench blasting explosive according to claim 1 is characterized in that: in step c, if take the mode of volley, k
2Actual value should be the k that obtains of experiment
2The value 1.1～1.2 times; If take sequentially to pursue between the hole mode of hole explosion, k
2Actual value should be the k that obtains of experiment
2The value 0.80～0.85 times; If take the mode of buffer blasting, the resulting k of first and second artillery salvo hole explosive specific charge
2Value will multiply by 1.2～1.3, and each row adopts the explosive specific charge of with no pressure quarrel explosion later on.
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| CN105693441A (en) * | 2016-01-31 | 2016-06-22 | 张慧 | Industrial coalbed methane mixture |
| CN112036047A (en) * | 2020-09-09 | 2020-12-04 | 中国葛洲坝集团易普力股份有限公司 | Blasting parameter dynamic design method based on mining processing full-flow energy consumption analysis |
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| CN1167917A (en) * | 1997-04-30 | 1997-12-17 | 陶纪南 | Method for determining optimum earth rock blasting parameters by blasting crater test |
| CN1419102A (en) * | 2002-10-10 | 2003-05-21 | 游宝健 | Blasting hole construction method for ladder section deep hole blasting |
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| CN1167917A (en) * | 1997-04-30 | 1997-12-17 | 陶纪南 | Method for determining optimum earth rock blasting parameters by blasting crater test |
| CN1419102A (en) * | 2002-10-10 | 2003-05-21 | 游宝健 | Blasting hole construction method for ladder section deep hole blasting |
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Address after: 401122 Chongqing City, the new Northern District of starlight Road No. five, No. 2 Patentee after: CHINA GEZHOUBA GROUP EXPLOSIVE CO., LTD. Address before: 400023, 16 floor, International Chamber of Commerce building, No. 78, the Yanghe River Road, Jiangbei District, Chongqing Patentee before: Gezhouba Explosive Co., Ltd. |